https://pastebin.com/DM4HryrP

Caused by: java.lang.NullPointerException: Cannot load from object array because "this.growth_stages" is null
	at com.github.alexthe666.iceandfire.entity.EntityDragonBase.getRenderSize(EntityDragonBase.java:1811) ~[iceandfire-2.1.13-1.20.1-beta-4.jar%23294!/:2.1.13-1.20.1-beta-4]
	at com.github.alexthe666.iceandfire.entity.EntityDragonBase.m_6134_(EntityDragonBase.java:1802) ~[iceandfire-2.1.13-1.20.1-beta-4.jar%23294!/:2.1.13-1.20.1-beta-4]
	at com.github.alexthe666.iceandfire.entity.EntityDragonBase.m_6972_(EntityDragonBase.java:1797) ~[iceandfire-2.1.13-1.20.1-beta-4.jar%23294!/:2.1.13-1.20.1-beta-4]
	at net.minecraft.world.entity.Entity.getDimensionsForge(Entity.java:3496) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.entity.Entity.<init>(Entity.java:261) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.entity.LivingEntity.<init>(LivingEntity.java:233) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.entity.Mob.<init>(Mob.java:123) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.entity.PathfinderMob.<init>(PathfinderMob.java:14) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.entity.AgeableMob.<init>(AgeableMob.java:29) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.entity.animal.Animal.<init>(Animal.java:40) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.entity.TamableAnimal.<init>(TamableAnimal.java:28) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at com.github.alexthe666.iceandfire.entity.EntityDragonBase.<init>(EntityDragonBase.java:238) ~[iceandfire-2.1.13-1.20.1-beta-4.jar%23294!/:2.1.13-1.20.1-beta-4]
	at com.github.alexthe666.iceandfire.entity.EntityIceDragon.<init>(EntityIceDragon.java:53) ~[iceandfire-2.1.13-1.20.1-beta-4.jar%23294!/:2.1.13-1.20.1-beta-4]
	at net.minecraft.world.entity.EntityType.m_20615_(EntityType.java:525) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at com.github.alexthe666.iceandfire.world.feature.SpawnDragonSkeleton.m_142674_(SpawnDragonSkeleton.java:34) ~[iceandfire-2.1.13-1.20.1-beta-4.jar%23294!/:2.1.13-1.20.1-beta-4]
	at net.minecraft.world.level.levelgen.feature.Feature.m_225028_(Feature.java:155) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.level.levelgen.feature.ConfiguredFeature.m_224953_(ConfiguredFeature.java:28) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.level.levelgen.placement.PlacedFeature.m_226362_(PlacedFeature.java:54) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?]
	at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) ~[?:?]
	at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) ~[?:?]
	at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?]
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?]
	at net.minecraft.world.level.levelgen.placement.PlacedFeature.m_226368_(PlacedFeature.java:53) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.level.levelgen.placement.PlacedFeature.m_226377_(PlacedFeature.java:42) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.level.chunk.ChunkGenerator.m_213609_(ChunkGenerator.java:357) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.level.chunk.ChunkStatus.m_279978_(ChunkStatus.java:108) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.level.chunk.ChunkStatus$SimpleGenerationTask.m_214024_(ChunkStatus.java:309) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.world.level.chunk.ChunkStatus.m_280308_(ChunkStatus.java:252) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at net.minecraft.server.level.ChunkMap.lambda$scheduleChunkGeneration$27(ChunkMap.java:643) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%23114!/:?]
	at net.minecraft.server.level.ChunkMap.lambda$scheduleChunkGeneration$29(ChunkMap.java:634) ~[client-1.20.1-20230612.114412-srg.jar%23340!/:?]
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[?:?]
	... 11 more
[21May2024 02:33:05.129] [Server thread/INFO] [Dragon Survival/]: Rebuilding configuration...
[21May2024 02:33:05.207] [Render thread/INFO] [ChunkBuilder/]: Stopping worker threads