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Daughter has been playing recently and this error came up a couple nights ago. I have the crash report as well.

---- Minecraft Crash Report ----

WARNING: coremods are present:

Contact their authors BEFORE contacting forge

// Why is it breaking

Time: 1/19/19 10:16 PM

Description: Exception in server tick loop

java.lang.RuntimeException: Unknown character ' ' in 'C:/Users/KirstenB/AppData/Roaming/.minecraft/config/CustomSpawner/overworld/EntitySpawnTypes.cfg:1'

at drzhark.customspawner.configuration.CMSConfiguration.load(CMSConfiguration.java:444)

at drzhark.customspawner.configuration.CMSConfiguration.<init>(CMSConfiguration.java:84)

at drzhark.customspawner.environment.EnvironmentSettings.registerConfigs(EnvironmentSettings.java:117)

at drzhark.customspawner.environment.EnvironmentSettings.<init>(EnvironmentSettings.java:100)

at drzhark.customspawner.utils.CMSUtils.addWorldEnvironment(CMSUtils.java:109)

at drzhark.customspawner.EventHooks.structureMapGen(EventHooks.java:188)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_71_EventHooks_structureMapGen_InitMapGenEvent.invoke(.dynamic)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)

at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:179)

at net.minecraftforge.event.terraingen.TerrainGen.getModdedMapGen(TerrainGen.java:47)

at biomesoplenty.common.world.ChunkGeneratorOverworldBOP.<init>(ChunkGeneratorOverworldBOP.java:102)

at biomesoplenty.common.world.WorldTypeBOP.getChunkGenerator(WorldTypeBOP.java:38)

at net.minecraft.world.WorldProvider.func_186060_c(WorldProvider.java:63)

at net.minecraft.world.WorldServer.func_72970_h(WorldServer.java:848)

at net.minecraft.world.WorldServer.<init>(WorldServer.java:118)

at WorldServerOF.<init>(WorldServerOF.java:25)

at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:94)

at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:209)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)

at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

-- System Details --

Details:

Minecraft Version: 1.12.2

Operating System: Windows 8.1 (amd64) version 6.3

Java Version: 1.8.0_51, Oracle Corporation

Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 710503208 bytes (677 MB) / 1342177280 bytes (1280 MB) up to 2147483648 bytes (2048 MB)

JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M

IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

FML: MCP 9.42 Powered by Forge 14.23.3.2655 Optifine OptiFine_1.12.2_HD_U_D3 15 mods loaded, 15 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 |

|:------- |:-------------- |:------------ |:--------------------------------------------- |:---------------------------------------- |

| UCHIJAA | minecraft | 1.12.2 | minecraft.jar | None |

| UCHIJAA | mcp | 9.42 | minecraft.jar | None |

| UCHIJAA | FML | 8.0.99.99 | forge-1.12.2-14.23.3.2655.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |

| UCHIJAA | forge | 14.23.3.2655 | forge-1.12.2-14.23.3.2655.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |

| UCHIJAA | biomesoplenty | 7.0.1.2325 | BiomesOPlenty-1.12.2-7.0.1.2325-universal.jar | None |

| UCHIJAA | cfm | 4.2.0 | cfm-4.2.0-mc1.12.2.jar | None |

| UCHIJAA | customspawner | 3.11.4 | CustomMobSpawner-3.11.4.jar | None |

| UCHIJAA | mocreatures | 12.0.4 | DrZharks MoCreatures Mod-12.0.4.jar | None |

| UCHIJAA | harvestcraft | 1.12.2o | HarvestCraft-Mod-1.12.2.jar | None |

| UCHIJAA | ichunutil | 7.1.0 | iChunUtil-1.12.2-7.1.0.jar | None |

| UCHIJAA | japaricraftmod | 2.9.5 | JapariCraft-Mod-1.12.jar | None |

| UCHIJAA | jei | 4.8.5.159 | jei_1.12.2-4.8.5.159.jar | None |

| UCHIJAA | radixcore | 1.12.x-2.2.1 | RadixCore-1.12.x-2.2.1-universal.jar | None |

| UCHIJAA | mca | 1.12.2-5.3.1 | MCA-1.12.x-5.3.1-universal.jar | None |

| UCHIJAA | morph | 7.0.0 | Morph-1.12.2-7.0.0.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: 0 / 8; []

Type: Integrated Server (map_client.txt)

Is Modded: Definitely; Client brand changed to 'fml,forge'

OptiFine Version: OptiFine_1.12.2_HD_U_D3

OptiFine Build: 20180515-125031

Render Distance Chunks: 8

Mipmaps: 4

Anisotropic Filtering: 1

Antialiasing: 0

Multitexture: false

Shaders: null

OpenGlVersion: 4.4.0 - Build 21.20.16.4541

OpenGlRenderer: Intel(R) HD Graphics 510

OpenGlVendor: Intel

CpuCount: 2