creating dimension causes null point expectacion error

[8763875]

This happend after creating four dimension, then game jammed and crash, (this happend only creating dimensions)

on forge 1.20.1

Time: 2025-07-21 17:00:45
Description: Exception generating new chunk

java.lang.NullPointerException: Cannot invoke "net.minecraft.core.Holder.m_203543_()" because "biome" is null
at mcjty.rftoolsdim.dimension.biomes.RFTBiomeProvider.getMappedBiome(RFTBiomeProvider.java:96) ~[rftoolsdim-1.20-11.0.10.jar%23326!/:1.20-11.0.10] {re:classloading}
at mcjty.rftoolsdim.dimension.biomes.RFTBiomeProvider.getDefaultBiome(RFTBiomeProvider.java:220) ~[rftoolsdim-1.20-11.0.10.jar%23326!/:1.20-11.0.10] {re:classloading}
at mcjty.rftoolsdim.dimension.biomes.RFTBiomeProvider.m_203407_(RFTBiomeProvider.java:212) ~[rftoolsdim-1.20-11.0.10.jar%23326!/:1.20-11.0.10] {re:classloading}
at net.minecraft.world.level.biome.BiomeSource.m_213971_(BiomeSource.java:140) ~[client-1.20.1-20230612.114412-srg.jar%23352!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:alexscaves.mixins.json:BiomeSourceMixin,pl:mixin:APP:terrablender.mixins.json:MixinBiomeSource,pl:mixin:APP:ru.mixin.json:access.BiomeSourceAccess,pl:mixin:APP:fabric-biome-api-v1.mixins.json:BiomeSourceMixin,pl:mixin:A}
at net.minecraft.world.level.biome.BiomeSource.m_220570_(BiomeSource.java:74) ~[client-1.20.1-20230612.114412-srg.jar%23352!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:alexscaves.mixins.json:BiomeSourceMixin,pl:mixin:APP:terrablender.mixins.json:MixinBiomeSource,pl:mixin:APP:ru.mixin.json:access.BiomeSourceAccess,pl:mixin:APP:fabric-biome-api-v1.mixins.json:BiomeSourceMixin,pl:mixin:A}
at net.minecraft.world.level.chunk.ChunkGeneratorStructureState.m_254937_(ChunkGeneratorStructureState.java:145) ~[client-1.20.1-20230612.114412-srg.jar%23352!/:?] {re:classloading}
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768) ~[?:?] {}
at java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1760) ~[?:?] {}
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?] {}
at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?] {}
at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?] {}
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?] {}
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?] {}

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

-- Head --
Thread: Server thread
Suspected Mod:
RFToolsDimensions (rftoolsdim), Version: 1.20-11.0.10
Issue tracker URL: http://github.com/McJtyMods/RFToolsDimensions/issues
at TRANSFORMER/rftoolsdim@1.20-11.0.10/mcjty.rftoolsdim.dimension.biomes.RFTBiomeProvider.getMappedBiome(RFTBiomeProvider.java:96)

[McJty]

Seems like it's crashing in AlexCaves. Could be an incompatibility. Not much I can do from my side though