The Start Minecraft Client Test Environment option is not functioning. I have no idea why, so I'll paste the report here.
Executing gradle command: clean runClient
Build info: MCreator 1.8.0, 64-bit, 8016 MB, Windows 10, JVM 1.8.0_172
C:\Pylo\MCreator180\forge>gradlew -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" clean runClient
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
#################################################
ForgeGradle 2.3-SNAPSHOT-ee3e3df
https://github.com/MinecraftForge/ForgeGradle
#################################################
Powered by MCP
http://modcoderpack.com
by: Searge, ProfMobius, R4wk, ZeuX
Fesh0r, IngisKahn, bspkrs, LexManos
#################################################
:clean
:deobfCompileDummyTask
:deobfProvidedDummyTask
:getVersionJson
:extractUserdev
:downloadClient SKIPPED
:downloadServer SKIPPED
:splitServerJar SKIPPED
:mergeJars SKIPPED
:applyBinaryPatches SKIPPED
:extractDependencyATs SKIPPED
:extractMcpData SKIPPED
:extractMcpMappings
:genSrgs SKIPPED
:deobfMcMCP SKIPPED
:sourceApiJava
:compileApiJava UP-TO-DATE
:processApiResources UP-TO-DATE
:apiClasses UP-TO-DATE
:sourceMainJava
:compileJava
:processResources
:classes
:jar
:extractNatives SKIPPED
:getAssetIndex UP-TO-DATE
:getAssets
Current status: 1061/1305 81%
:makeStart
:runClient
2018-10-11 14:01:07,366 main WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream
[14:01:07] [main/INFO]: Extra: []
[14:01:07] [main/INFO]: Running with arguments: [--userProperties, {}, --assetsDir, C:/Users/jesse/.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]
[14:01:07] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[14:01:07] [main/INFO]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[14:01:07] [main/INFO]: Loading tweak class name net.minecraftforge.gradle.tweakers.CoremodTweaker
[14:01:07] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[14:01:07] [main/INFO]: Forge Mod Loader version 14.23.4.2705 for Minecraft 1.12.2 loading
[14:01:07] [main/INFO]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_172, running on Windows 10:amd64:10.0, installed at C:\Pylo\MCreator180\jdk\jre
[14:01:07] [main/ERROR]: Apache Maven library folder was not in the format expected. Using default libraries directory.
[14:01:07] [main/ERROR]: Full: C:\Users\jesse\.mcreator\gradle\caches\modules-2\files-2.1\org.apache.maven\maven-artifact\3.5.3\7dc72b6d6d8a6dced3d294ed54c2cc3515ade9f4\maven-artifact-3.5.3.jar
[14:01:07] [main/ERROR]: Trimmed: c:/users/jesse/.mcreator/gradle/caches/modules-2/files-2.1/org.apache.maven/maven-artifact/3.5.3/
[14:01:07] [main/INFO]: Managed to load a deobfuscated Minecraft name- we are in a deobfuscated environment. Skipping runtime deobfuscation
[14:01:07] [main/INFO]: Ignoring missing certificate for coremod FMLCorePlugin (net.minecraftforge.fml.relauncher.FMLCorePlugin), we are in deobf and it's a forge core plugin
[14:01:07] [main/INFO]: Ignoring missing certificate for coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin), we are in deobf and it's a forge core plugin
[14:01:07] [main/INFO]: Searching C:\Pylo\MCreator180\forge\run\.\mods for mods
[14:01:07] [main/INFO]: Calling tweak class net.minecraftforge.gradle.tweakers.CoremodTweaker
[14:01:07] [main/INFO]: Injecting location in coremod net.minecraftforge.fml.relauncher.FMLCorePlugin
[14:01:07] [main/INFO]: Injecting location in coremod net.minecraftforge.classloading.FMLForgePlugin
[14:01:07] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:01:07] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[14:01:07] [main/INFO]: Loading tweak class name net.minecraftforge.gradle.tweakers.AccessTransformerTweaker
[14:01:07] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:01:07] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:01:07] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
2018-10-11 14:01:08,209 main WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream
2018-10-11 14:01:08,466 main WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream
[14:01:09] [main/ERROR]: FML appears to be missing any signature data. This is not a good thing
[14:01:09] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[14:01:09] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[14:01:09] [main/INFO]: Calling tweak class net.minecraftforge.gradle.tweakers.AccessTransformerTweaker
[14:01:09] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[14:01:09] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[14:01:09] [main/INFO]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[14:01:10] [main/INFO]: Setting user: Player13
[14:01:14] [main/INFO]: LWJGL Version: 2.9.4
[14:01:14] [main/ERROR]: Couldn't set pixel format
org.lwjgl.LWJGLException: Pixel format not accelerated
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:247) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at org.lwjgl.opengl.Display.createWindow(Display.java:306) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at org.lwjgl.opengl.Display.create(Display.java:848) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at org.lwjgl.opengl.Display.create(Display.java:757) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at net.minecraft.client.Minecraft.createDisplay(Minecraft.java:624) [Minecraft.class:?]
at net.minecraft.client.Minecraft.init(Minecraft.java:457) [Minecraft.class:?]
at net.minecraft.client.Minecraft.run(Minecraft.java:377) [Minecraft.class:?]
at net.minecraft.client.main.Main.main(SourceFile:123) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_172]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_172]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_172]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_172]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_172]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_172]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_172]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_172]
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
at GradleStart.main(GradleStart.java:25) [start/:?]
[14:01:15] [main/INFO]: [net.minecraft.init.Bootstrap:printToSYSOUT:553 ---- Minecraft Crash Report ----
// Don't do that.
Time: 10/11/18 2:01 PM
Description: Initializing game
org.lwjgl.LWJGLException: Pixel format not accelerated
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method)
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52)
at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:247)
at org.lwjgl.opengl.Display.createWindow(Display.java:306)
at org.lwjgl.opengl.Display.create(Display.java:848)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at net.minecraft.client.Minecraft.createDisplay(Minecraft.java:644)
at net.minecraft.client.Minecraft.init(Minecraft.java:457)
at net.minecraft.client.Minecraft.run(Minecraft.java:377)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
at GradleStart.main(GradleStart.java:25)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Client thread
Stacktrace:
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method)
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52)
at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:247)
at org.lwjgl.opengl.Display.createWindow(Display.java:306)
at org.lwjgl.opengl.Display.create(Display.java:848)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at net.minecraft.client.Minecraft.createDisplay(Minecraft.java:644)
at net.minecraft.client.Minecraft.init(Minecraft.java:457)
-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.run(Minecraft.java:377)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
at GradleStart.main(GradleStart.java:25)
-- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_172, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 324525352 bytes (309 MB) / 542113792 bytes (517 MB) up to 1870135296 bytes (1783 MB)
JVM Flags: 0 total;
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML:
Loaded coremods (and transformers):
Launched Version: 1.12.2
LWJGL: 2.9.4
OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
GL Caps:
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs:
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
CPU:
[14:01:15] [main/INFO]: [net.minecraft.init.Bootstrap:printToSYSOUT:553 #@!@# Game crashed! Crash report saved to: #@!@# C:\Pylo\MCreator180\forge\run\.\crash-reports\crash-2018-10-11_14.01.15-client.txt
:runClient FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':runClient'.
> Process 'command 'C:\Pylo\MCreator180\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.
BUILD FAILED
Total time: 44.776 secs
C:\Pylo\MCreator180\forge>
Task completed with return code 0 in 45314 milliseconds
Issue comments
I tried reinstalling it and it didn't work.
I did filter through the console code and found a few error messages, could these have anything to do with it?
[13:48:49] [main/ERROR] [FML]: FML appears to be missing any signature data. This is not a good thing
[13:48:48] [main/ERROR] [FML]: Apache Maven library folder was not in the format expected. Using default libraries directory.
[13:48:48] [main/ERROR] [FML]: Full: C:\Users\jesse\.mcreator\gradle\caches\modules-2\files-2.1\org.apache.maven\maven-artifact\3.5.3\7dc72b6d6d8a6dced3d294ed54c2cc3515ade9f4\maven-artifact-3.5.3.jar
[13:48:48] [main/ERROR] [FML]: Trimmed: c:/users/jesse/.mcreator/gradle/caches/modules-2/files-2.1/org.apache.maven/maven-artifact/3.5.3/
No, these are not related to this issue. Do you still get this part of the error?
[14:01:14] [main/ERROR]: Couldn't set pixel format
org.lwjgl.LWJGLException: Pixel format not accelerated
This is the main issue in your case, but the fix should normally be related to the settings of GPU.
This error usually means that you have an unsupported graphics card for Minecraft our outdated graphics card drivers. This page could help: