GUI CRASH 1.12.2 (FURNACE GUI)

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 5/5/20 1:26 AM
Description: Ticking player

java.lang.ArrayIndexOutOfBoundsException: 1
    at java.util.Arrays$ArrayList.get(Arrays.java:3841)
    at net.minecraft.util.NonNullList.get(NonNullList.java:51)
    at net.mcreator.regiotime.block.BlockAsador$TileEntityCustom.getStackInSlot(BlockAsador.java:239)
    at net.minecraft.inventory.Slot.getStack(Slot.java:81)
    at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:97)
    at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:365)
    at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2171)
    at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:871)
    at net.minecraft.world.World.updateEntity(World.java:2130)
    at net.minecraft.world.WorldServer.tickPlayers(WorldServer.java:672)
    at net.minecraft.world.World.updateEntities(World.java:1906)
    at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:643)
    at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:842)
    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: Server thread
Stacktrace:
    at java.util.Arrays$ArrayList.get(Arrays.java:3841)
    at net.minecraft.util.NonNullList.get(NonNullList.java:51)
    at net.mcreator.regiotime.block.BlockAsador$TileEntityCustom.getStackInSlot(BlockAsador.java:239)
    at net.minecraft.inventory.Slot.getStack(Slot.java:81)
    at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:97)
    at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:365)
    at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2171)
    at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:871)
    at net.minecraft.world.World.updateEntity(World.java:2130)

-- Player being ticked --
Details:
    Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
    Entity ID: 268
    Entity Name: Player985
    Entity's Exact location: -160.66, 63.00, 255.75
    Entity's Block location: World: (-161,63,255), Chunk: (at 15,3,15 in -11,15; contains blocks -176,0,240 to -161,255,255), 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.world.WorldServer.tickPlayers(WorldServer.java:672)
    at net.minecraft.world.World.updateEntities(World.java:1906)
    at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:643)

-- Affected level --
Details:
    Level name: New World
    All players: 1 total; [EntityPlayerMP['Player985'/268, l='New World', x=-160.66, y=63.00, z=255.75]]
    Chunk stats: ServerChunkCache: 273 Drop: 0
    Level seed: 6504496675298174937
    Level generator: ID 00 - default, ver 1. Features enabled: true
    Level generator options:
    Level spawn location: World: (-160,64,252), Chunk: (at 0,4,12 in -10,15; contains blocks -160,0,240 to -145,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
    Level time: 6687 game time, 6687 day time
    Level dimension: 0
    Level storage version: 0x04ABD - Anvil
    Level weather: Rain time: 35625 (now: false), thunder time: 44103 (now: false)
    Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
    at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:842)
    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_232, BellSoft
    Java VM Version: OpenJDK 64-Bit Server VM (mixed mode),
    Memory: 720754968 bytes (687 MB) / 925368320 bytes (882 MB) up to 3787980800 bytes (3612 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 | regiotime | 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['Player985'/268, l='New World', x=-160.66, y=63.00, z=255.75]]
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'fml,forge'