This is the error message that I am receiving but I am not quite sure how to pin point the problem of my game. Is one of my mods messing with my world generation?  I see that a lot of them say (Incompatible) below. Thank you for any help you can provide!

 

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 6/29/20 1:04 PM
Description: Exception generating new chunk

java.lang.NullPointerException: Exception generating new chunk
    at net.minecraft.world.gen.ChunkGenerator.func_222528_a(ChunkGenerator.java:186) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.chunk.ChunkStatus.lambda$static$3(ChunkStatus.java:52) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.chunk.ChunkStatus$$Lambda$1571/807125353.doWork(Unknown Source) ~[?:?] {}
    at net.minecraft.world.chunk.ChunkStatus$ISelectiveWorker.doWork(ChunkStatus.java:237) ~[?:?] {re:classloading}
    at net.minecraft.world.chunk.ChunkStatus.func_223198_a(ChunkStatus.java:195) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.server.ChunkManager.lambda$null$18(ChunkManager.java:518) ~[?:?] {re:classloading}
    at net.minecraft.world.server.ChunkManager$$Lambda$6629/14002123.apply(Unknown Source) ~[?:?] {}
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-2.0.24.jar:?] {}
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$20(ChunkManager.java:516) ~[?:?] {re:classloading}
    at net.minecraft.world.server.ChunkManager$$Lambda$6626/1703831772.apply(Unknown Source) ~[?:?] {}
    at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952) ~[?:1.8.0_51] {}
    at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926) ~[?:1.8.0_51] {}
    at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442) ~[?:1.8.0_51] {}
    at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.func_219083_b(SourceFile:58) ~[?:?] {re:classloading}
    at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter$$Lambda$6570/234132235.run(Unknown Source) ~[?:?] {}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213148_e(SourceFile:83) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213145_a(SourceFile:123) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(SourceFile:91) ~[?:?] {re:classloading}
    at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) ~[?:1.8.0_51] {}
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[?:1.8.0_51] {}
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) ~[?:1.8.0_51] {}
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689) ~[?:1.8.0_51] {}
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157) ~[?:1.8.0_51] {}

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

-- Head --
Thread: Server thread
Stacktrace:
    at net.minecraft.world.gen.ChunkGenerator.func_222528_a(ChunkGenerator.java:186)
    at net.minecraft.world.chunk.ChunkStatus.lambda$static$3(ChunkStatus.java:52)
    at net.minecraft.world.chunk.ChunkStatus$$Lambda$1571/807125353.doWork(Unknown Source)
    at net.minecraft.world.chunk.ChunkStatus$ISelectiveWorker.doWork(ChunkStatus.java:237)
    at net.minecraft.world.chunk.ChunkStatus.func_223198_a(ChunkStatus.java:195)

-- Chunk to be generated --
Details:
    Location: -22,-44
    Position hash: -184683593750
    Generator: net.minecraft.world.gen.OverworldChunkGenerator@19b91fa2
Stacktrace:
    at net.minecraft.world.server.ChunkManager.lambda$null$18(ChunkManager.java:518)
    at net.minecraft.world.server.ChunkManager$$Lambda$6629/14002123.apply(Unknown Source)
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$20(ChunkManager.java:516)
    at net.minecraft.world.server.ChunkManager$$Lambda$6626/1703831772.apply(Unknown Source)
    at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
    at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
    at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
    at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.func_219083_b(SourceFile:58)
    at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter$$Lambda$6570/234132235.run(Unknown Source)
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213148_e(SourceFile:83)
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213145_a(SourceFile:123)
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(SourceFile:91)

-- Affected level --
Details:
    All players: 1 total; [ServerPlayerEntity['Azteca09'/104, l='Mundo de Cabron', x=-448.33, y=64.00, z=-593.91]]
    Chunk stats: ServerChunkCache: 3411
    Level dimension: DimensionType{minecraft:overworld}
    Level name: Mundo de Cabron
    Level seed: 1884151853366724329
    Level generator: ID 00 - default, ver 1. Features enabled: true
    Level generator options: {}
    Level spawn location: World: (224,64,-256), Chunk: (at 0,4,0 in 14,-16; contains blocks 224,0,-256 to 239,255,-241), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
    Level time: 1472296 game time, 1803757 day time
    Known server brands: forge
    Level was modded: true
    Level storage version: 0x04ABD - Anvil
    Level weather: Rain time: 70100 (now: false), thunder time: 10748 (now: false)
    Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:852)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:784)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:114)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:637)
    at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
    Minecraft Version: 1.15.2
    Minecraft Version ID: 1.15.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1028049768 bytes (980 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
    CPUs: 4
    JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    ModLauncher: 5.1.0+69+master.79f13f7
    ModLauncher launch target: fmlclient
    ModLauncher naming: srg
    ModLauncher services: 
        /eventbus-2.2.0-service.jar eventbus PLUGINSERVICE 
        /forge-1.15.2-31.2.0.jar object_holder_definalize PLUGINSERVICE 
        /forge-1.15.2-31.2.0.jar runtime_enum_extender PLUGINSERVICE 
        /accesstransformers-2.1.1-shadowed.jar accesstransformer PLUGINSERVICE 
        /forge-1.15.2-31.2.0.jar capability_inject_definalize PLUGINSERVICE 
        /forge-1.15.2-31.2.0.jar runtimedistcleaner PLUGINSERVICE 
        /forge-1.15.2-31.2.0.jar fml TRANSFORMATIONSERVICE 
    FML: 31.2
    Forge: net.minecraftforge:31.2.0
    FML Language Providers: 
        [email protected]
        minecraft@1
        [email protected]
    Mod List: 
        forge-1.15.2-31.2.0-client.jar Minecraft {[email protected] DONE}
        decorative_blocks-6d.jar Decorative Blocks {[email protected] DONE}
        champions-FORGE-1.15.2-2.0-beta3.jar Champions {[email protected] DONE}
        AmbientSounds_v3.0.20_mc1.15.2.jar Ambient Sounds {[email protected] DONE}
        roughmobsrevamped-1.15.2-4.1.2.jar Rough Mobs Revamped {roughmobsrevamped@version DONE}
        guardvillagers-1.15.2-1.0.7.jar Guard Villagers {[email protected] DONE}
        Hwyla-forge-1.10.8-B72_1.15.2.jar Waila {waila@version DONE}
        jei-1.15.2-6.0.0.4.jar Just Enough Items {[email protected] DONE}
        CevlsMagics-1.0.jar Cevl's Magics {[email protected] DONE}
        leveluphp-mc1.15.2-forge-5.1.2 (1).jar Level Up HP {[email protected] DONE}
        Abnormals-Core-1.15.2-1.0.6.jar Abnormals Core {[email protected] DONE}
        xercamod-1.15.2-2.5.jar Xerca Mod {[email protected] DONE}
        forge-1.15.2-31.2.0-universal.jar Forge {[email protected] DONE}
        Upgrade-Aquatic-1.15.2-v1.6.1.jar Upgrade Aquatic {[email protected] DONE}
        Savage-and-Ravage-1.15.2-1.1.3.jar Savage & Ravage {[email protected] DONE}
        create-mc1.15.2_v0.2.4d.jar Create {[email protected]_v0.2.4d DONE}
        BetterCaves-1.15.2-1.0.jar YUNG's Better Caves {[email protected] DONE}
        Waystones_1.15.2-6.0.1.jar Waystones {[email protected] DONE}
        enchantedwolves-1.4.2.jar Enchanted Wolves {[email protected] DONE}
        infernalmobs-1.15.2.1.jar Infernal Mobs {[email protected] DONE}
        SullysMod-V0.7FIX.jar Sully's Mod {[email protected] DONE}
        RottenCreatures-1.15.2-0.9.7.jar Rotten Creatures {[email protected] DONE}
    Player Count: 1 / 8; [ServerPlayerEntity['Azteca09'/104, l='Mundo de Cabron', x=-448.33, y=64.00, z=-593.91]]
    Data Packs: mod:waystones (incompatible), mod:waila (incompatible), mod:leveluphp, mod:cevls_magics (incompatible), mod:infernalmobs (incompatible), mod:champions, mod:xercamod (incompatible), mod:sullys_mod, mod:enchantedwolves, mod:ambientsounds (incompatible), mod:upgrade_aquatic (incompatible), mod:jei (incompatible), vanilla, mod:decorative_blocks, mod:roughmobsrevamped (incompatible), mod:guardvillagers (incompatible), mod:abnormals_core, mod:forge (incompatible), mod:savageandravage, mod:create, mod:bettercaves (incompatible), mod:rotten_creatures
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'forge'

1 hour ago, GranAzteca said:

   Data Packs: mod:waystones (incompatible), mod:waila (incompatible), mod:leveluphp, mod:cevls_magics (incompatible), mod:infernalmobs (incompatible), mod:champions, mod:xercamod (incompatible), mod:sullys_mod, mod:enchantedwolves, mod:ambientsounds (incompatible), mod:upgrade_aquatic (incompatible), mod:jei (incompatible), vanilla, mod:decorative_blocks, mod:roughmobsrevamped (incompatible), mod:guardvillagers (incompatible), mod:abnormals_core, mod:forge (incompatible), mod:savageandravage, mod:create, mod:bettercaves (incompatible), mod:rotten_creatures

Correct me if I'm wrong, but based off this. It appears that the data packs build into the mods/ones that you installed are incompatible with your Minecraft and/or Forge version. Please check to make sure that mods and Forge use the same version. If not, try 

1. Making a new world
2. Disabling one mod at a to see if that mod is the problem,  you can disable mods by added(.disabled) to the end of the mods name

 

Yes, you're using the first version of Forge for 1.15.2. Update to the latest version, for 1.15.2.

how do you fix this problem 

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 1/31/22 1:35 PM
Description: Exception generating new chunk

java.lang.NullPointerException: Exception generating new chunk
    at net.minecraft.world.gen.ChunkGenerator.func_222528_a(ChunkGenerator.java:186) ~[?:?] {re:classloading}
    at net.minecraft.world.chunk.ChunkStatus.lambda$static$3(ChunkStatus.java:52) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.chunk.ChunkStatus$ISelectiveWorker.doWork(ChunkStatus.java:237) ~[?:?] {re:classloading}
    at net.minecraft.world.chunk.ChunkStatus.func_223198_a(ChunkStatus.java:195) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.server.ChunkManager.lambda$null$18(ChunkManager.java:518) ~[?:?] {re:classloading}
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-2.0.24.jar:?] {re:classloading,re:classloading}
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$20(ChunkManager.java:516) ~[?:?] {re:classloading}
    at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952) ~[?:1.8.0_74] {}
    at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926) ~[?:1.8.0_74] {}
    at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442) ~[?:1.8.0_74] {}
    at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.func_219083_b(SourceFile:58) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213148_e(SourceFile:83) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213145_a(SourceFile:123) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(SourceFile:91) ~[?:?] {re:classloading}
    at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) ~[?:1.8.0_74] {}
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[?:1.8.0_74] {}
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) ~[?:1.8.0_74] {}
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) ~[?:1.8.0_74] {}
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157) ~[?:1.8.0_74] {}

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

-- Head --
Thread: Server thread
Stacktrace:
    at net.minecraft.world.gen.ChunkGenerator.func_222528_a(ChunkGenerator.java:186)
    at net.minecraft.world.chunk.ChunkStatus.lambda$static$3(ChunkStatus.java:52)
    at net.minecraft.world.chunk.ChunkStatus$ISelectiveWorker.doWork(ChunkStatus.java:237)
    at net.minecraft.world.chunk.ChunkStatus.func_223198_a(ChunkStatus.java:195)

-- Chunk to be generated --
Details:
    Location: 0,-54
    Position hash: -231928233984
    Generator: net.minecraft.world.gen.OverworldChunkGenerator@4b4eceeb
Stacktrace:
    at net.minecraft.world.server.ChunkManager.lambda$null$18(ChunkManager.java:518)
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$20(ChunkManager.java:516)
    at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
    at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
    at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
    at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.func_219083_b(SourceFile:58)
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213148_e(SourceFile:83)
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213145_a(SourceFile:123)
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(SourceFile:91)

-- Affected level --
Details:
    All players: 1 total; [ServerPlayerEntity['Jordan_0'/109, l='777', x=-181.30, y=74.00, z=-692.87]]
    Chunk stats: ServerChunkCache: 3388
    Level dimension: DimensionType{minecraft:overworld}
    Level name: 777
    Level seed: 2548979297328099264
    Level generator: ID 00 - default, ver 1. Features enabled: true
    Level generator options: {}
    Level spawn location: World: (-224,68,-240), Chunk: (at 0,4,0 in -14,-15; contains blocks -224,0,-240 to -209,255,-225), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
    Level time: 293972 game time, 306179 day time
    Known server brands: forge
    Level was modded: true
    Level storage version: 0x04ABD - Anvil
    Level weather: Rain time: 59936 (now: false), thunder time: 51762 (now: false)
    Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:852)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:784)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:114)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:637)
    at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
    Minecraft Version: 1.15.2
    Minecraft Version ID: 1.15.2
    Operating System: Mac OS X (x86_64) version 10.15.5
    Java Version: 1.8.0_74, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1081478840 bytes (1031 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
    CPUs: 8
    JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    ModLauncher: 5.1.2+70+master.2845bb9
    ModLauncher launch target: fmlclient
    ModLauncher naming: srg
    ModLauncher services: 
        /mixin-0.8.2.jar mixin PLUGINSERVICE 
        /eventbus-2.2.1-service.jar eventbus PLUGINSERVICE 
        /forge-1.15.2-31.2.57.jar object_holder_definalize PLUGINSERVICE 
        /forge-1.15.2-31.2.57.jar runtime_enum_extender PLUGINSERVICE 
        /accesstransformers-2.1.3-shadowed.jar accesstransformer PLUGINSERVICE 
        /forge-1.15.2-31.2.57.jar capability_inject_definalize PLUGINSERVICE 
        /forge-1.15.2-31.2.57.jar runtimedistcleaner PLUGINSERVICE 
        /mixin-0.8.2.jar mixin TRANSFORMATIONSERVICE 
        /forge-1.15.2-31.2.57.jar fml TRANSFORMATIONSERVICE 
    FML: 31.2
    Forge: net.minecraftforge:31.2.57
    FML Language Providers: 
        [email protected]
        minecraft@1
    Mod List: 
        forge-1.15.2-31.2.57-client.jar Minecraft {[email protected] DONE}
        mowziesmobs-1.5.15.jar Mowzie's Mobs {[email protected] DONE}
        forge-1.15.2-31.2.57-universal.jar Forge {[email protected] DONE}
        torohealth-1.15.2-forge-1.jar ToroHealth {torohealth@NONE DONE}
        Reliquary-1.15.2-1.3.4.1018.jar Reliquary {[email protected] DONE}
        mine-mine-no-mi-1.15.2-0.7.2.jar Mine Mine no Mi {[email protected] DONE}
        curios-FORGE-1.15.2-2.0.2.7.jar Curios API {[email protected] DONE}
        Bountiful+Baubles-1.15.2-0.0.1.jar Bountiful Baubles {bountifulbaubles@NONE DONE}
        jei-1.15.2-6.0.3.16.jar Just Enough Items {[email protected] DONE}
        Artifacts-1.15.2-2.5.3.jar Artifacts {[email protected] DONE}
    Player Count: 1 / 8; [ServerPlayerEntity['Jordan_0'/109, l='777', x=-181.30, y=74.00, z=-692.87]]
    Data Packs: mod:bountifulbaubles (incompatible), mod:mowziesmobs (incompatible), vanilla, mod:forge (incompatible), mod:torohealth, mod:xreliquary (incompatible), mod:mineminenomi (incompatible), mod:curios (incompatible), mod:jei (incompatible), mod:artifacts
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'forge'