Help with mcreator version Issue !

   Hello , I was working on my mod on the Mcreator 1.8.3 , it was working very well but when I goes on mcreator 1.8.9 by transfering my mod under .mcr files there is an issue , when I launch a world on mcreator 1.8.9 with the mod which where working with mcreator 1.8.3 it just crash the game , console following :

   
Executing gradle command: runClient
Build info: MCreator 1.9.0, 64-bit, 16326 MB, Windows 10 - cmd, JVM 1.8.0_212, JAVA_HOME: C:\Program Files\Pylo\MCreator\jdk
(c) 2018 Microsoft Corporation. Tous droits r‚serv‚s.
C:\Users\Megaport\MCreatorWorkspaces\.mcreator>gradlew -Dorg.gradle.java.home="C:/Program Files/Pylo/MCreator/jdk" -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" runClient 
Starting a Gradle Daemon, 1 incompatible Daemon could not be reused, use --status for details
The project name '.mcreator' starts or ends with a '.'. This has been deprecated and is scheduled to be removed in Gradle 5.0. Set the 'rootProject.name' or adjust the 'include' statement (see https://docs.gradle.org/4.4/dsl/org.gradle.api.initialization.Settings…).
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
#################################################
         ForgeGradle 2.3-SNAPSHOT-7764e3e        
  https://github.com/MinecraftForge/ForgeGradle  
#################################################
                 Powered by MCP                  
             http://modcoderpack.com             
     by: Searge, ProfMobius, R4wk, ZeuX          
     Fesh0r, IngisKahn, bspkrs, LexManos         
#################################################
:deobfCompileDummyTask
:deobfProvidedDummyTask
:sourceApiJava UP-TO-DATE
:compileApiJava NO-SOURCE
:processApiResources NO-SOURCE
:apiClasses UP-TO-DATE
:sourceMainJava UP-TO-DATE
:compileJava UP-TO-DATE
:processResources
:classes
:jar
:getVersionJson
:extractNatives SKIPPED
:extractUserdev UP-TO-DATE
:getAssetIndex UP-TO-DATE
:getAssets
Current status: 703/1305   53%
Current status: 1062/1305   81%
Current status: 1074/1305   82%
Current status: 1123/1305   86%
Current status: 1150/1305   88%
Current status: 1292/1305   99%
:makeStart
:runClient
11:40.34 [main/INFO] [GradleStart]: Extra: []
11:40.34 [main/INFO] [GradleStart]: Running with arguments: [--userProperties, {}, --assetsDir, C:/Users/Megaport/.mcreator/gradle/caches/minecraft/assets, --assetIndex, 1.12, --accessToken{REDACTED}, --version, 1.12.2, --tweakClass, net.minecraftforge.fml.common.launcher.FMLTweaker, --tweakClass, net.minecraftforge.gradle.tweakers.CoremodTweaker]
11:40.35 [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
11:40.35 [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
11:40.35 [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.gradle.tweakers.CoremodTweaker
11:40.35 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
11:40.35 [main/INFO] [FML]: Forge Mod Loader version 14.23.5.2768 for Minecraft 1.12.2 loading
11:40.35 [main/INFO] [FML]: Java is LibericaJDK 64-Bit Server VM, version 1.8.0_212, running on Windows 10:amd64:10.0, installed at C:\Program Files\Pylo\MCreator\jdk\jre
11:40.35 [main/ERROR] [FML]: Apache Maven library folder was not in the format expected. Using default libraries directory.
11:40.35 [main/ERROR] [FML]: Full: C:\Users\Megaport\.mcreator\gradle\caches\modules-2\files-2.1\org.apache.maven\maven-artifact\3.5.3\7dc72b6d6d8a6dced3d294ed54c2cc3515ade9f4\maven-artifact-3.5.3.jar
11:40.35 [main/ERROR] [FML]: Trimmed: c:/users/megaport/.mcreator/gradle/caches/modules-2/files-2.1/org.apache.maven/maven-artifact/3.5.3/
11:40.35 [main/INFO] [FML]: Managed to load a deobfuscated Minecraft name- we are in a deobfuscated environment. Skipping runtime deobfuscation
11:40.35 [main/INFO] [FML]: Detected deobfuscated environment, loading log configs for colored console logs.
2019-07-24 11:40:36,143 main WARN Disabling terminal, you're running in an unsupported environment.
11:40.36 [main/INFO] [FML]: Ignoring missing certificate for coremod FMLCorePlugin (net.minecraftforge.fml.relauncher.FMLCorePlugin), we are in deobf and it's a forge core plugin
11:40.36 [main/INFO] [FML]: Ignoring missing certificate for coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin), we are in deobf and it's a forge core plugin
11:40.36 [main/INFO] [FML]: Searching C:\Users\Megaport\MCreatorWorkspaces\.mcreator\run\.\mods for mods
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.gradle.tweakers.CoremodTweaker
11:40.36 [main/INFO] [GradleStart]: Injecting location in coremod net.minecraftforge.fml.relauncher.FMLCorePlugin
11:40.36 [main/INFO] [GradleStart]: Injecting location in coremod net.minecraftforge.classloading.FMLForgePlugin
11:40.36 [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.gradle.tweakers.AccessTransformerTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
11:40.36 [main/ERROR] [FML]: FML appears to be missing any signature data. This is not a good thing
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.gradle.tweakers.AccessTransformerTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
11:40.36 [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.client.main.Main}
11:40.37 [main/INFO] [minecraft/Minecraft]: Setting user: Player703
11:40.38 [main/INFO] [minecraft/Minecraft]: LWJGL Version: 2.9.4
11:40.39 [main/INFO] [FML]: -- System Details --
Details:
   Minecraft Version: 1.12.2
   Operating System: Windows 10 (amd64) version 10.0
   Java Version: 1.8.0_212, BellSoft
   Java VM Version: LibericaJDK 64-Bit Server VM (mixed mode), 
   Memory: 114321232 bytes (109 MB) / 489684992 bytes (467 MB) up to 3804758016 bytes (3628 MB)
   JVM Flags: 0 total; 
   IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
   FML: 
   Loaded coremods (and transformers): 
   GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 388.13' Renderer: 'GeForce GTX 1050 Ti/PCIe/SSE2'
11:40.39 [main/INFO] [FML]: MinecraftForge v14.23.5.2768 Initialized
11:40.39 [main/INFO] [FML]: Starts to replace vanilla recipe ingredients with ore ingredients.
11:40.39 [main/INFO] [FML]: Replaced 1036 ore ingredients
11:40.39 [main/INFO] [FML]: Searching C:\Users\Megaport\MCreatorWorkspaces\.mcreator\run\.\mods for mods
11:40.40 [main/INFO] [FML]: Forge Mod Loader has identified 5 mods to load
11:40.40 [main/INFO] [FML]: Attempting connection with missing mods [minecraft, mcp, FML, forge, dark_medieval] at CLIENT
11:40.40 [main/INFO] [FML]: Attempting connection with missing mods [minecraft, mcp, FML, forge, dark_medieval] at SERVER
11:40.41 [main/INFO] [minecraft/SimpleReloadableResourceManager]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:Darklands medieval
11:40.41 [Thread-3/INFO] [FML]: Using sync timing. 200 frames of Display.update took 58655787 nanos
11:40.41 [main/INFO] [FML]: Processing ObjectHolder annotations
11:40.41 [main/INFO] [FML]: Found 1253 ObjectHolder annotations
11:40.41 [main/INFO] [FML]: Identifying ItemStackHolder annotations
11:40.41 [main/INFO] [FML]: Found 0 ItemStackHolder annotations
11:40.41 [main/INFO] [FML]: Configured a dormant chunk cache size of 0
11:40.41 [Forge Version Check/INFO] [forge.VersionCheck]: [forge] Starting version check at http://files.minecraftforge.net/maven/net/minecraftforge/forge/promotio…
11:40.41 [main/INFO] [FML]: OBJLoader: Domain dark_medieval has been added.
11:40.41 [main/INFO] [FML]: Applying holder lookups
11:40.41 [main/INFO] [FML]: Holder lookups applied
11:40.41 [main/INFO] [FML]: Applying holder lookups
11:40.41 [main/INFO] [FML]: Holder lookups applied
11:40.41 [main/INFO] [FML]: Applying holder lookups
11:40.41 [main/INFO] [FML]: Holder lookups applied
11:40.41 [main/INFO] [FML]: Applying holder lookups
11:40.41 [main/INFO] [FML]: Holder lookups applied
11:40.41 [main/INFO] [FML]: Injecting itemstacks
11:40.41 [main/INFO] [FML]: Itemstack injection complete
11:40.41 [Forge Version Check/INFO] [forge.VersionCheck]: [forge] Found status: UP_TO_DATE Target: null
11:40.44 [Sound Library Loader/INFO] [minecraft/SoundManager]: Starting up SoundSystem...
11:40.44 [Thread-5/INFO] [minecraft/SoundManager]: Initializing LWJGL OpenAL
11:40.44 [Thread-5/INFO] [minecraft/SoundManager]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
11:40.44 [Thread-5/INFO] [minecraft/SoundManager]: OpenAL initialized.
11:40.44 [Sound Library Loader/INFO] [minecraft/SoundManager]: Sound engine started
11:40.47 [main/INFO] [FML]: Max texture size: 16384
11:40.47 [main/INFO] [minecraft/TextureMap]: Created: 512x512 textures-atlas
11:40.48 [main/INFO] [FML]: Applying holder lookups
11:40.48 [main/INFO] [FML]: Holder lookups applied
11:40.48 [main/INFO] [FML]: Injecting itemstacks
11:40.48 [main/INFO] [FML]: Itemstack injection complete
11:40.48 [main/INFO] [FML]: Forge Mod Loader has successfully loaded 5 mods
11:40.48 [main/INFO] [mojang/NarratorWindows]: Narrator library for x64 successfully loaded
11:40.49 [Realms Notification Availability checker #1/INFO] [mojang/RealmsClient]: Could not authorize you against Realms server: Invalid session id
11:41.00 [Server thread/INFO] [minecraft/IntegratedServer]: Starting integrated minecraft server version 1.12.2
11:41.00 [Server thread/INFO] [minecraft/IntegratedServer]: Generating keypair
11:41.00 [Server thread/INFO] [FML]: Injecting existing registry data into this server instance
11:41.00 [Server thread/INFO] [FML]: Applying holder lookups
11:41.00 [Server thread/INFO] [FML]: Holder lookups applied
11:41.00 [Server thread/INFO] [FML]: Loading dimension 0 (New World) (net.minecraft.server.integrated.IntegratedServer@6ca7d7fa)
11:41.00 [Server thread/INFO] [minecraft/AdvancementList]: Loaded 497 advancements
11:41.01 [Server thread/INFO] [FML]: Loading dimension -1 (New World) (net.minecraft.server.integrated.IntegratedServer@6ca7d7fa)
11:41.01 [Server thread/INFO] [FML]: Loading dimension 1 (New World) (net.minecraft.server.integrated.IntegratedServer@6ca7d7fa)
11:41.01 [Server thread/INFO] [minecraft/MinecraftServer]: Preparing start region for level 0
11:41.02 [Server thread/INFO] [minecraft/MinecraftServer]: Preparing spawn area: 13%
11:41.03 [Server thread/INFO] [minecraft/MinecraftServer]: Preparing spawn area: 27%
11:41.04 [Server thread/INFO] [minecraft/MinecraftServer]: Preparing spawn area: 43%
11:41.05 [Server thread/INFO] [minecraft/MinecraftServer]: Preparing spawn area: 69%
11:41.06 [Server thread/INFO] [minecraft/MinecraftServer]: Preparing spawn area: 95%
11:41.06 [Server thread/INFO] [FML]: Unloading dimension -1
11:41.06 [Server thread/INFO] [FML]: Unloading dimension 1
11:41.06 [Server thread/INFO] [minecraft/IntegratedServer]: Changing view distance to 5, from 10
11:41.07 [Netty Local Client IO #0/INFO] [FML]: Server protocol version 2
11:41.07 [Netty Server IO #1/INFO] [FML]: Client protocol version 2
11:41.07 [Netty Server IO #1/INFO] [FML]: Client attempting to join with 5 mods : minecraft@1.12.2,FML@8.0.99.99,forge@14.23.5.2768,mcp@9.42,dark_medieval@1.0.0
11:41.07 [Netty Local Client IO #0/INFO] [FML]: [Netty Local Client IO #0] Client side modded connection established
11:41.07 [Server thread/INFO] [FML]: [Server thread] Server side modded connection established
11:41.07 [Server thread/INFO] [minecraft/PlayerList]: Player703[local:E:32c35a2b] logged in with entity id 2313 at (-247.5, 66.0, 134.5)
11:41.07 [Server thread/INFO] [minecraft/MinecraftServer]: Player703 joined the game
11:41.07 [Server thread/ERROR] [FML]: Exception caught during firing event net.minecraftforge.fml.common.gameevent.TickEvent$PlayerTickEvent@654e1730:
java.lang.NullPointerException: null
   at net.minecraft.advancements.PlayerAdvancements.startProgress(PlayerAdvancements.java:379
) ~[PlayerAdvancements.class:?]
   at net.minecraft.advancements.PlayerAdvancements.getProgress(PlayerAdvancements.java:371
) ~[PlayerAdvancements.class:?]
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.executeProcedure(MCreatorThiefprocedure.java:33
) ~[MCreatorThiefprocedure.class:?]
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.onPlayerTick(MCreatorThiefprocedure.java:57
) ~[MCreatorThiefprocedure.class:?]
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_19_MCreatorThiefprocedure_onPlayerTick_PlayerTickEvent.invoke(.dynamic) ~[?:?]
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90
) ~[ASMEventHandler.class:?]
   at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182
) [EventBus.class:?]
   at net.minecraftforge.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:370
) [FMLCommonHandler.class:?]
   at net.minecraft.entity.player.EntityPlayer.updateSize(EntityPlayer.java:416
) [EntityPlayer.class:?]
   at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:326
) [EntityPlayer.class:?]
   at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:423
) [EntityPlayerMP.class:?]
   at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:185
) [NetHandlerPlayServer.class:?]
   at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:212
) [NetworkDispatcher$1.class:?]
   at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:307
) [NetworkManager.class:?]
   at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:197
) [NetworkSystem.class:?]
   at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:865
) [MinecraftServer.class:?]
   at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743
) [MinecraftServer.class:?]
   at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192
) [IntegratedServer.class:?]
   at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592
) [MinecraftServer.class:?]
   at java.lang.Thread.run(Thread.java:748
) [?:1.8.0_212]
11:41.07 [Server thread/ERROR] [FML]: Index: 1 Listeners:
11:41.07 [Server thread/ERROR] [FML]: 0: NORMAL
11:41.07 [Server thread/ERROR] [FML]: 1: ASM: net.mcreator.dark_medieval.MCreatorThiefprocedure@5241aea8 onPlayerTick(Lnet/minecraftforge/fml/common/gameevent/TickEvent$PlayerTickEvent;)V
11:41.08 [Server thread/ERROR] [minecraft/MinecraftServer]: Encountered an unexpected exception
net.minecraft.util.ReportedException: Ticking player
   at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:212
) ~[NetworkSystem.class:?]
   at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:865
) ~[MinecraftServer.class:?]
   at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743
) ~[MinecraftServer.class:?]
   at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192
) ~[IntegratedServer.class:?]
   at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592
) [MinecraftServer.class:?]
   at java.lang.Thread.run(Thread.java:748
) [?:1.8.0_212]
Caused by: java.lang.NullPointerException
   at net.minecraft.advancements.PlayerAdvancements.startProgress(PlayerAdvancements.java:379
) ~[PlayerAdvancements.class:?]
   at net.minecraft.advancements.PlayerAdvancements.getProgress(PlayerAdvancements.java:371
) ~[PlayerAdvancements.class:?]
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.executeProcedure(MCreatorThiefprocedure.java:33
) ~[MCreatorThiefprocedure.class:?]
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.onPlayerTick(MCreatorThiefprocedure.java:57
) ~[MCreatorThiefprocedure.class:?]
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_19_MCreatorThiefprocedure_onPlayerTick_PlayerTickEvent.invoke(.dynamic) ~[?:?]
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90
) ~[ASMEventHandler.class:?]
   at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182
) ~[EventBus.class:?]
   at net.minecraftforge.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:370
) ~[FMLCommonHandler.class:?]
   at net.minecraft.entity.player.EntityPlayer.updateSize(EntityPlayer.java:416
) ~[EntityPlayer.class:?]
   at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:326
) ~[EntityPlayer.class:?]
   at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:423
) ~[EntityPlayerMP.class:?]
   at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:185
) ~[NetHandlerPlayServer.class:?]
   at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:212
) ~[NetworkDispatcher$1.class:?]
   at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:307
) ~[NetworkManager.class:?]
   at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:197
) ~[NetworkSystem.class:?]
   ... 5 more
11:41.08 [Server thread/ERROR] [minecraft/MinecraftServer]: This crash report has been saved to: C:\Users\Megaport\MCreatorWorkspaces\.mcreator\run\.\crash-reports\crash-2019-07-24_11.41.08-server.txt
11:41.08 [Server thread/INFO] [minecraft/MinecraftServer]: Stopping server
11:41.08 [Server thread/INFO] [minecraft/MinecraftServer]: Saving players
11:41.08 [Server thread/INFO] [minecraft/MinecraftServer]: Saving worlds
11:41.08 [Server thread/INFO] [minecraft/MinecraftServer]: Saving chunks for level 'New World'/overworld
11:41.08 [main/INFO] [STDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:629 ---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.
Time: 7/24/19 11:41 AM
Description: Ticking player
java.lang.NullPointerException: Ticking player
   at net.minecraft.advancements.PlayerAdvancements.startProgress(PlayerAdvancements.java:379
)
   at net.minecraft.advancements.PlayerAdvancements.getProgress(PlayerAdvancements.java:371
)
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.executeProcedure(MCreatorThiefprocedure.java:33
)
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.onPlayerTick(MCreatorThiefprocedure.java:57
)
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_19_MCreatorThiefprocedure_onPlayerTick_PlayerTickEvent.invoke(.dynamic)
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90
)
   at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182
)
   at net.minecraftforge.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:370
)
   at net.minecraft.entity.player.EntityPlayer.updateSize(EntityPlayer.java:416
)
   at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:326
)
   at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:423
)
   at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:185
)
   at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:212
)
   at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:307
)
   at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:197
)
   at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:865
)
   at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743
)
   at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192
)
   at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592
)
   at java.lang.Thread.run(Thread.java:748
)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Client thread
Stacktrace:
   at net.minecraft.advancements.PlayerAdvancements.startProgress(PlayerAdvancements.java:379
)
   at net.minecraft.advancements.PlayerAdvancements.getProgress(PlayerAdvancements.java:371
)
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.executeProcedure(MCreatorThiefprocedure.java:33
)
   at net.mcreator.dark_medieval.MCreatorThiefprocedure.onPlayerTick(MCreatorThiefprocedure.java:57
)
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_19_MCreatorThiefprocedure_onPlayerTick_PlayerTickEvent.invoke(.dynamic)
   at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90
)
   at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182
)
   at net.minecraftforge.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:370
)
   at net.minecraft.entity.player.EntityPlayer.updateSize(EntityPlayer.java:416
)
   at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:326
)
-- Player being ticked --
Details:
   Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
   Entity ID: 2313
   Entity Name: Player703
   Entity's Exact location: -247.50, 66.00, 134.50
   Entity's Block location: World: (-248,66,134), Chunk: (at 8,4,6 in -16,8; contains blocks -256,0,128 to -241,255,143), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
   Entity's Momentum: 0.00, -0.08, 0.00
   Entity's Passengers: []
   Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
   at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:423
)
   at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:185
)
   at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:212
)
   at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:307
)
-- Ticking connection --
Details:
   Connection: net.minecraft.network.NetworkManager@4e230320
Stacktrace:
   at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:197
)
   at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:865
)
   at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743
)
   at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192
)
   at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592
)
   at java.lang.Thread.run(Thread.java:748
)
-- System Details --
Details:
   Minecraft Version: 1.12.2
   Operating System: Windows 10 (amd64) version 10.0
   Java Version: 1.8.0_212, BellSoft
   Java VM Version: LibericaJDK 64-Bit Server VM (mixed mode), 
   Memory: 260293888 bytes (248 MB) / 1032847360 bytes (985 MB) up to 3804758016 bytes (3628 MB)
   JVM Flags: 0 total; 
   IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
   FML: MCP 9.42 Powered by Forge 14.23.5.2768 5 mods loaded, 5 mods active
   States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
   | State     | ID            | Version      | Source                           | Signature |
   |:--------- |:------------- |:------------ |:-------------------------------- |:--------- |
   | UCHIJAAAA | minecraft     | 1.12.2       | minecraft.jar                    | None      |
   | UCHIJAAAA | mcp           | 9.42         | minecraft.jar                    | None      |
   | UCHIJAAAA | FML           | 8.0.99.99    | forgeSrc-1.12.2-14.23.5.2768.jar | None      |
   | UCHIJAAAA | forge         | 14.23.5.2768 | forgeSrc-1.12.2-14.23.5.2768.jar | None      |
   | UCHIJAAAA | dark_medieval | 1.0.0        | modid-1.0.jar                    | None      |
   Loaded coremods (and transformers): 
   GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
   Profiler Position: N/A (disabled)
   Player Count: 1 / 8; [EntityPlayerMP['Player703'/2313, l='New World', x=-247.50, y=66.00, z=134.50]]
   Type: Integrated Server (map_client.txt)
   Is Modded: Definitely; Client brand changed to 'fml,forge'
11:41.08 [main/INFO] [STDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:629 #@!@# Game crashed! Crash report saved to: #@!@# .\crash-reports\crash-2019-07-24_11.41.08-server.txt
11:41.08 [main/INFO] [FML]: Waiting for the server to terminate/save.
11:41.08 [pool-2-thread-1/WARN] [mojang/YggdrasilMinecraftSessionService]: Couldn't look up profile properties for com.mojang.authlib.GameProfile@2f80367c[id=6ecd1629-dee4-373d-9457-481bd36b0826,name=Player703,properties={},legacy=false]
com.mojang.authlib.exceptions.AuthenticationException: The client has sent too many requests within a certain amount of time
   at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:79
) ~[YggdrasilAuthenticationService.class:?]
   at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillGameProfile(YggdrasilMinecraftSessionService.java:180
) [YggdrasilMinecraftSessionService.class:?]
   at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService$1.load(YggdrasilMinecraftSessionService.java:60
) [YggdrasilMinecraftSessionService$1.class:?]
   at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService$1.load(YggdrasilMinecraftSessionService.java:57
) [YggdrasilMinecraftSessionService$1.class:?]
   at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3716
) [guava-21.0.jar:?]
   at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2424
) [guava-21.0.jar:?]
   at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2298
) [guava-21.0.jar:?]
   at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2211
) [guava-21.0.jar:?]
   at com.google.common.cache.LocalCache.get(LocalCache.java:4154
) [guava-21.0.jar:?]
   at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4158
) [guava-21.0.jar:?]
   at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5147
) [guava-21.0.jar:?]
   at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:5153
) [guava-21.0.jar:?]
   at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:170
) [YggdrasilMinecraftSessionService.class:?]
   at net.minecraft.client.Minecraft.getProfileProperties(Minecraft.java:3181
) [Minecraft.class:?]
   at net.minecraft.client.resources.SkinManager$3.run(SkinManager.java:138
) [SkinManager$3.class:?]
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511
) [?:1.8.0_212]
   at java.util.concurrent.FutureTask.run(FutureTask.java:266
) [?:1.8.0_212]
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149
) [?:1.8.0_212]
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624
) [?:1.8.0_212]
   at java.lang.Thread.run(Thread.java:748
) [?:1.8.0_212]
11:41.08 [Server thread/INFO] [FML]: Unloading dimension 0
11:41.08 [Server thread/INFO] [FML]: Applying holder lookups
11:41.08 [Server thread/INFO] [FML]: Holder lookups applied
11:41.08 [Server thread/INFO] [FML]: The state engine was in incorrect state SERVER_STOPPING and forced into state SERVER_STOPPED. Errors may have been discarded.
11:41.08 [main/INFO] [FML]: Server terminated.
11:41.08 [Client Shutdown Thread/INFO] [minecraft/MinecraftServer]: Stopping server
AL lib: (EE) alc_cleanup: 1 device not closed
:runClient FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':runClient'.
> Process 'command 'C:\Program Files\Pylo\MCreator\jdk\bin\java.exe'' finished with non-zero exit value -1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 1m 17s
13 actionable tasks: 8 executed, 5 up-to-date
C:\Users\Megaport\MCreatorWorkspaces\.mcreator>
Task completed with return code 0 in 77802 milliseconds

Thank you very much for the help !