Large lag spikes and console spam with the same error over and over again. Not sure what's causing it.

[18:46:53] [Server thread/WARN] [minecraft/BlockEntity]: Skipping BlockEntity with id castleblocks:castle_block_entity
[18:46:53] [Server thread/ERROR] [minecraft/BlockEntity]: Failed to load data for block entity castleblocks:castle_block_entity
java.lang.NullPointerException: Cannot invoke "net.minecraft.nbt.Tag.m_6458_()" because "p_129234_" is null
at net.minecraft.nbt.NbtUtils.m_129233_(NbtUtils.java:191) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,re:classloading}
at net.minecraft.nbt.CompoundTag.m_128342_(CompoundTag.java:196) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:recipeessentials.mixins.json:nbt.CompoundNBTMixin,pl:mixin:APP:modernfix-common.mixins.json:perf.nbt_memory_usage.CompoundTagMixin,pl:mixin:A}
at com.jusipat.castleblocks.block.CastleBlockEntity.m_142466_(CastleBlockEntity.java:38) ~[castleblocks-1.0.12-forge-1.20.1.jar%23264!/:1.0.12] {re:classloading}
at net.minecraft.world.level.block.entity.BlockEntity.m_155246_(BlockEntity.java:122) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:itemproductionlib.mixins.json:minecraft/BlockEntityMixin,pl:mixin:A}
at java.util.Optional.map(Optional.java:260) ~[?:?] {re:mixin}
at net.minecraft.world.level.block.entity.BlockEntity.m_155241_(BlockEntity.java:120) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:itemproductionlib.mixins.json:minecraft/BlockEntityMixin,pl:mixin:A}
at net.minecraft.world.level.chunk.storage.ChunkSerializer.m_196900_(ChunkSerializer.java:402) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:architectury.mixins.json:MixinChunkSerializer,pl:mixin:A}
at net.minecraft.world.level.chunk.LevelChunk.m_62952_(LevelChunk.java:438) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:snowrealmagic.mixins.json:LevelChunkMixin,pl:mixin:APP:moonlight-common.mixins.json:LevelChunkMixin,pl:mixin:A}
at net.minecraft.server.level.ChunkMap.mixinextras$bridge$m_62952_$142(ChunkMap.java) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:bugfix.paper_chunk_patches.ChunkMapMixin,pl:mixin:APP:modernfix-forge.mixins.json:bugfix.chunk_deadlock.ChunkMapLoadMixin,pl:mixin:APP:smallships-common-soft.mixins.json:leashing.ChunkMapMixin,pl:mixin:APP:smoothchunk.mixins.json:ChunkMapMixin,pl:mixin:A}
at net.minecraft.server.level.ChunkMap.wrapOperation$zem000$setCurrentLoadingThenPostLoad(ChunkMap.java:1905) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:bugfix.paper_chunk_patches.ChunkMapMixin,pl:mixin:APP:modernfix-forge.mixins.json:bugfix.chunk_deadlock.ChunkMapLoadMixin,pl:mixin:APP:smallships-common-soft.mixins.json:leashing.ChunkMapMixin,pl:mixin:APP:smoothchunk.mixins.json:ChunkMapMixin,pl:mixin:A}
at net.minecraft.server.level.ChunkMap.m_214854_(ChunkMap.java:715) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:bugfix.paper_chunk_patches.ChunkMapMixin,pl:mixin:APP:modernfix-forge.mixins.json:bugfix.chunk_deadlock.ChunkMapLoadMixin,pl:mixin:APP:smallships-common-soft.mixins.json:leashing.ChunkMapMixin,pl:mixin:APP:smoothchunk.mixins.json:ChunkMapMixin,pl:mixin:A}
at com.mojang.datafixers.util.Either.lambda$mapLeft$0(Either.java:162) ~[datafixerupper-6.0.8.jar%2377!/:?] {re:mixin}
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {}
at com.mojang.datafixers.util.Either.mapLeft(Either.java:162) ~[datafixerupper-6.0.8.jar%2377!/:?] {re:mixin}
at net.minecraft.server.level.ChunkMap.m_287044_(ChunkMap.java:699) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:bugfix.paper_chunk_patches.ChunkMapMixin,pl:mixin:APP:modernfix-forge.mixins.json:bugfix.chunk_deadlock.ChunkMapLoadMixin,pl:mixin:APP:smallships-common-soft.mixins.json:leashing.ChunkMapMixin,pl:mixin:APP:smoothchunk.mixins.json:ChunkMapMixin,pl:mixin:A}
at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:646) ~[?:?] {}
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?] {}
at net.minecraft.server.level.ChunkTaskPriorityQueueSorter.m_143188_(ChunkTaskPriorityQueueSorter.java:62) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:classloading}
at net.minecraft.util.thread.BlockableEventLoop.m_6367_(BlockableEventLoop.java:156) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:perf.fix_loop_spin_waiting.BlockableEventLoopMixin,pl:mixin:A}
at net.minecraft.server.level.ServerChunkCache$MainThreadExecutor.m_6367_(ServerChunkCache.java:541) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.util.thread.BlockableEventLoop.m_7245_(BlockableEventLoop.java:130) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:perf.fix_loop_spin_waiting.BlockableEventLoopMixin,pl:mixin:A}
at net.minecraft.server.level.ServerChunkCache$MainThreadExecutor.m_7245_(ServerChunkCache.java:549) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.level.ServerChunkCache.m_8466_(ServerChunkCache.java:269) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:cupboard.mixins.json:ChunkLoadDebug,pl:mixin:APP:smoothchunk.mixins.json:ServerChunkCacheMixin,pl:mixin:APP:modernfix-forge.mixins.json:bugfix.chunk_deadlock.ServerChunkCache_CurrentLoadingMixin,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_129961_(MinecraftServer.java:758) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_7245_(MinecraftServer.java:747) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
at net.minecraft.util.thread.BlockableEventLoop.m_18701_(BlockableEventLoop.java:139) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:perf.fix_loop_spin_waiting.BlockableEventLoopMixin,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_130012_(MinecraftServer.java:733) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:665) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251) ~[server-1.20.1-20230612.114412-srg.jar%23381!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
at java.lang.Thread.run(Thread.java:842) ~[?:?] `{re:mixin}``

Are you running with any other mods?

I am. It seems that the issue is stemming from modernfix and castleblocks. It's a mixins issue, the modpack is Baron's and Bishops's Modpack on curseforge. Sent from my T-Mobile 5G Device
…
-------- Original message -------- From: jusipat @.> Date: 6/8/24 6:25 PM (GMT-08:00) To: jusipat/CastleBlocks @.> Cc: ItsRileyNJ @.>, Author @.> Subject: Re: [jusipat/CastleBlocks] ServFailed to load data for block entity castleblocks:castle_block_entity (Issue #25)
-------- Original message -------- From: jusipat @.> Date: 6/8/24 6:25 PM (GMT-08:00) To: jusipat/CastleBlocks @.> Cc: ItsRileyNJ @.>, Author @.> Subject: Re: [jusipat/CastleBlocks] ServFailed to load data for block entity castleblocks:castle_block_entity (Issue #25) Are you running with any other mods? — Reply to this email directly, view it on GitHub<#25 (comment)>, or unsubscribehttps://github.com/notifications/unsubscribe-auth/BFXFGWVW5TTBOIBMDO6WXUDZGOVKHAVCNFSM6AAAAABIXCDBU2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCNJWGI2TOOJUGA. You are receiving this because you authored the thread.Message ID: @.***>

Seeing as this error stems from mixin changes from other mods, I cannot do much for compat on my end. I also cannot replicate the same error on my end. Closing for now