below is the crash log. I was hoping to add this to my custom modpack but sadly will not be able to do to this bug. which is okay

---- Minecraft Crash Report ----

WARNING: coremods are present:
IELoadingPlugin (ImmersiveEngineering-core-0.12-98.jar)
SuperMartijn642's Core Lib Plugin (supermartijn642corelib-1.0.19-forge-mc1.12.jar)
ItemPatchingLoader (ItemPhysic_Full_1.4.37_mc1.12.2.jar)
MixinLoader (Locks-1.12.2-3.0.0.jar)
TransformerLoader (OpenComputers-MC1.12.2-1.7.7+5413028.jar)
Quark Plugin (Quark-r1.6-179.jar)
AppleCore (AppleCore-mc1.12.2-3.4.0.jar)
TickCentral (TickCentral-3.2.jar)
Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
MicdoodlePlugin (Galacticraft-1.12.2-4.0.3.jar)
LevelUpCore (levelup2-1.5.8.jar)
MixinBooter (!mixinbooter-5.0.jar)
MalisisCorePlugin (malisiscore-1.12.2-6.5.1.jar)
LoadingPlugin (HardcoreDarkness-MC1.12.2-2.0.jar)
LoadingPlugin (Reskillable-1.12.2-1.13.0.jar)
TransformLoader (DynamicSurroundings-1.12.2-3.6.1.0.jar)
RandomPatches (randompatches-1.12.2-1.22.1.10.jar)
SSLoadingPlugin (SereneSeasons-1.12.2-1.2.18-universal.jar)
Do not report to Forge! (If you haven't disabled the FoamFix coremod, try disabling it in the config! Note that this bit of text will still appear.) (foamfix-0.10.15-1.12.2.jar)
ForgelinPlugin (Forgelin-1.8.4.jar)
CreativePatchingLoader (CreativeCore_v1.10.70_mc1.12.2.jar)
SCFMLCorePlugin (StalkerCreepers-1.12.1.jar)
OpenModsCorePlugin (OpenModsLib-1.12.2-0.12.2.jar)
FutureMC (future-mc-0.2.11.jar)
MoreSoundConfigCore (moresoundconfig-core-1.0.4.jar)
NWRTweak (redstonepaste-mc1.12-1.7.5.jar)
CTMCorePlugin (CTM-MC1.12.2-1.0.2.31.jar)
llibrary (llibrary-core-1.0.11-1.12.2.jar)
PhosphorFMLLoadingPlugin (phosphor-1.12.2-0.2.6+build50.jar)
JustEnoughIDs Extension Plugin (JustEnoughIDs-1.0.4-SNAPSHOT-thin.jar)
HCASM (HammerLib-1.12.2-2.0.6.32.jar)
SpartanWeaponry-MixinLoader (SpartanWeaponry-1.12.2-1.4.1.jar)
BetterFoliageLoader (BetterFoliage-MC1.12-2.3.3.jar)
Contact their authors BEFORE contacting forge

// Surprise! Haha. Well, this is awkward.

Time: 10/3/22 11:24 PM
Description: Unexpected error

java.lang.RuntimeException: class shadows.fastfurnace.block.TileFastFurnace is missing a mapping! This is a bug!
at net.minecraft.tileentity.TileEntity.func_189516_d(TileEntity.java:78)
at net.minecraft.tileentity.TileEntity.func_189515_b(TileEntity.java:69)
at net.minecraft.tileentity.TileEntityLockable.func_189515_b(TileEntityLockable.java:22)
at net.minecraft.tileentity.TileEntityFurnace.func_189515_b(TileEntityFurnace.java:137)
at shadows.fastfurnace.block.TileFastFurnace.func_189515_b(TileFastFurnace.java:46)
at codersafterdark.reskillable.base.LevelLockHandler.rightClickBlock(LevelLockHandler.java:334)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_2134_LevelLockHandler_rightClickBlock_RightClickBlock.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at com.github.terminatornl.laggoggles.tickcentral.EventBusTransformer.redirectEvent(EventBusTransformer.java:67)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.common.ForgeHooks.onRightClickBlock(ForgeHooks.java:1137)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_187099_a(PlayerControllerMP.java:398)
at net.optifine.override.PlayerControllerOF.func_187099_a(PlayerControllerOF.java:96)
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1579)
at net.minecraft.client.Minecraft.func_184117_aA(Minecraft.java:2254)
at net.minecraft.client.Minecraft.func_184118_az(Minecraft.java:2020)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1808)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Thread: Client thread
Stacktrace:
at net.minecraft.tileentity.TileEntity.func_189516_d(TileEntity.java:78)
at net.minecraft.tileentity.TileEntity.func_189515_b(TileEntity.java:69)
at net.minecraft.tileentity.TileEntityLockable.func_189515_b(TileEntityLockable.java:22)
at net.minecraft.tileentity.TileEntityFurnace.func_189515_b(TileEntityFurnace.java:137)
at shadows.fastfurnace.block.TileFastFurnace.func_189515_b(TileFastFurnace.java:46)
at codersafterdark.reskillable.base.LevelLockHandler.rightClickBlock(LevelLockHandler.java:334)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_2134_LevelLockHandler_rightClickBlock_RightClickBlock.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at com.github.terminatornl.laggoggles.tickcentral.EventBusTransformer.redirectEvent(EventBusTransformer.java:67)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.common.ForgeHooks.onRightClickBlock(ForgeHooks.java:1137)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_187099_a(PlayerControllerMP.java:398)
at net.optifine.override.PlayerControllerOF.func_187099_a(PlayerControllerOF.java:96)
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1579)
at net.minecraft.client.Minecraft.func_184117_aA(Minecraft.java:2254)
at net.minecraft.client.Minecraft.func_184118_az(Minecraft.java:2020)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [GCEntityClientPlayerMP['LoneWolfGmer'/341, l='MpServer', x=59.34, y=4.00, z=515.60]]
Chunk stats: MultiplayerChunkCache: 282, 282
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (161,4,518), Chunk: (at 1,0,6 in 10,32; contains blocks 160,0,512 to 175,255,527), Region: (0,1; contains chunks 0,32 to 31,63, blocks 0,0,512 to 511,255,1023)
Level time: 109302 game time, 1000 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 53 total; [EntityGoat['Goat'/185, l='MpServer', x=30.70, y=4.00, z=558.72], EntityGoat['Goat'/186, l='MpServer', x=26.08, y=4.00, z=553.41], EntityCoyote['Coyote'/187, l='MpServer', x=27.09, y=4.00, z=556.58], EntityCoyote['Coyote'/188, l='MpServer', x=27.37, y=4.00, z=551.45], EntityCoyote['Coyote'/189, l='MpServer', x=24.42, y=4.00, z=554.52], EntityHorse['Horse'/190, l='MpServer', x=27.02, y=4.00, z=555.15], EntityChicken['Chicken'/191, l='MpServer', x=22.50, y=4.00, z=575.50], EntityChicken['Chicken'/192, l='MpServer', x=23.50, y=4.00, z=574.50], EntityChicken['Chicken'/193, l='MpServer', x=22.50, y=4.00, z=571.50], EntityChicken['Chicken'/194, l='MpServer', x=21.50, y=4.00, z=576.50], EntityMaka['Maka Lvl 2'/199, l='MpServer', x=2.65, y=4.00, z=440.65], EntityMakaAlpha['Golden Maka Alpha Lvl 3'/200, l='MpServer', x=-2.92, y=4.00, z=442.95], EntityArisaur['Arisaur Lvl 2'/213, l='MpServer', x=52.34, y=4.00, z=584.47], EntityMaka['Maka Lvl 3'/217, l='MpServer', x=4.72, y=4.00, z=443.71], EntitySheep['Sheep'/218, l='MpServer', x=4.23, y=4.00, z=529.20], EntitySheep['Sheep'/219, l='MpServer', x=-11.29, y=4.00, z=497.55], EntityCoyote['Coyote'/221, l='MpServer', x=59.85, y=4.00, z=568.75], EntityMakaAlpha['Maka Alpha Lvl 4'/222, l='MpServer', x=88.69, y=4.00, z=588.23], EntitySongbird['Songbird'/225, l='MpServer', x=80.49, y=4.00, z=485.49], EntityPheasant['Pheasant'/226, l='MpServer', x=58.96, y=4.00, z=474.94], EntityPheasant['Pheasant'/227, l='MpServer', x=98.22, y=4.00, z=506.52], EntityPig['Pig'/231, l='MpServer', x=65.47, y=4.00, z=558.27], EntityPig['Pig'/232, l='MpServer', x=105.31, y=4.00, z=533.43], EntityBoar['Boar'/234, l='MpServer', x=78.95, y=4.00, z=576.52], EntitySongbird['Songbird'/243, l='MpServer', x=93.40, y=4.00, z=481.57], EntitySongbird['Songbird'/244, l='MpServer', x=95.81, y=4.00, z=550.76], EntityGoat['Goat'/249, l='MpServer', x=110.50, y=4.00, z=474.08], EntitySongbird['Songbird'/253, l='MpServer', x=96.79, y=4.00, z=539.41], EntitySongbird['Songbird'/254, l='MpServer', x=96.42, y=4.00, z=549.87], EntityChicken['Chicken'/257, l='MpServer', x=99.19, y=4.00, z=567.53], EntityHorse['Horse'/262, l='MpServer', x=100.14, y=4.00, z=560.64], EntitySheep['Sheep'/266, l='MpServer', x=126.76, y=4.00, z=439.53], EntityGoat['Goat'/270, l='MpServer', x=122.19, y=4.00, z=471.02], EntityChicken['Chicken'/272, l='MpServer', x=112.83, y=4.00, z=527.08], EntityChicken['Chicken'/273, l='MpServer', x=121.67, y=4.00, z=575.86], EntityMaka['Maka Lvl 4'/274, l='MpServer', x=125.45, y=4.00, z=571.00], GCEntityClientPlayerMP['LoneWolfGmer'/341, l='MpServer', x=59.34, y=4.00, z=515.60], EntityLatchedRenderer['unknown'/1193, l='MpServer', x=8.50, y=65.00, z=8.50], EntityHat['unknown'/1194, l='MpServer', x=8.50, y=65.00, z=8.50], EntityItem['item.item.hatchery.chickenmanure'/345326, l='MpServer', x=21.22, y=4.00, z=575.72], EntityItem['item.item.hatchery.chickenmanure'/361918, l='MpServer', x=22.73, y=4.00, z=575.89], EntityItem['item.item.egg'/354785, l='MpServer', x=23.05, y=4.00, z=574.96], EntityItem['item.item.feather'/339580, l='MpServer', x=22.41, y=4.00, z=570.73], EntityItem['item.item.feather'/339693, l='MpServer', x=99.05, y=4.00, z=567.26], EntityHat['unknown'/364295, l='MpServer', x=59.34, y=4.00, z=515.60], EntityHat['unknown'/364296, l='MpServer', x=100.14, y=4.00, z=560.64], EntityItem['item.item.hatchery.chickenmanure'/340308, l='MpServer', x=22.43, y=4.00, z=571.90], EntityItem['item.item.betteranimalsplus.pheasant_egg'/340513, l='MpServer', x=97.86, y=4.00, z=505.63], EntityItem['item.item.hatchery.chickenmanure'/349052, l='MpServer', x=112.53, y=4.00, z=527.78], EntityItem['item.item.feather'/358274, l='MpServer', x=112.55, y=4.00, z=527.60], EntityItem['item.item.hatchery.chickenmanure'/342095, l='MpServer', x=99.74, y=4.00, z=567.77], EntityItem['item.item.hatchery.chickenmanure'/350603, l='MpServer', x=23.72, y=4.00, z=575.28], EntityItem['item.item.egg'/351780, l='MpServer', x=21.99, y=4.00, z=571.30]]
Retry entities: 2 total; [EntityLatchedRenderer['unknown'/1193, l='MpServer', x=8.50, y=65.00, z=8.50], EntityHat['unknown'/1194, l='MpServer', x=8.50, y=65.00, z=8.50]]
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:532)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:427)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)