My Single player Minecraft world crashed and won't open after running the extreme furnace. pasting the crash report below. maybe you can tell me what I did wrong?

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 3/12/22, 5:30 PM
Description: Ticking block entity

java.lang.NullPointerException: Cannot invoke "it.unimi.dsi.fastutil.objects.ObjectArrayList.get(int)" because "this.wrapped" is null
at it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap$MapIterator.nextEntry(Object2IntOpenHashMap.java:755) ~[fastutil-8.5.6.jar%2348!/:?] {}
at it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap$EntryIterator.next(Object2IntOpenHashMap.java:853) ~[fastutil-8.5.6.jar%2348!/:?] {}
at it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap$EntryIterator.next(Object2IntOpenHashMap.java:847) ~[fastutil-8.5.6.jar%2348!/:?] {}
at wily.betterfurnaces.blockentity.BlockEntitySmeltingBase.grantStoredRecipeExperience(BlockEntitySmeltingBase.java:987) ~[BetterFurnacesReforged-1.18.1-1.2.4.jar%2362!/:1.18.1-1.2.4] {re:classloading,pl:epic_rei_lmao:A}
at wily.betterfurnaces.blockentity.BlockEntitySmeltingBase.tick(BlockEntitySmeltingBase.java:362) ~[BetterFurnacesReforged-1.18.1-1.2.4.jar%2362!/:1.18.1-1.2.4] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.chunk.LevelChunk$BoundTickingBlockEntity.m_142224_(LevelChunk.java:673) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.chunk.LevelChunk$RebindableTickingBlockEntityWrapper.m_142224_(LevelChunk.java:768) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.Level.m_46463_(Level.java:476) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:324) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A,re:mixin,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:868) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:808) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:120) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,xf:OptiFine:default,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:668) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:258) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at java.lang.Thread.run(Thread.java:833) [?:?] {}

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

-- Head --
Thread: Server thread
Stacktrace:
at it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap$MapIterator.nextEntry(Object2IntOpenHashMap.java:755) ~[fastutil-8.5.6.jar%2348!/:?] {}
at it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap$EntryIterator.next(Object2IntOpenHashMap.java:853) ~[fastutil-8.5.6.jar%2348!/:?] {}
at it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap$EntryIterator.next(Object2IntOpenHashMap.java:847) ~[fastutil-8.5.6.jar%2348!/:?] {}
at wily.betterfurnaces.blockentity.BlockEntitySmeltingBase.grantStoredRecipeExperience(BlockEntitySmeltingBase.java:987) ~[BetterFurnacesReforged-1.18.1-1.2.4.jar%2362!/:1.18.1-1.2.4] {re:classloading,pl:epic_rei_lmao:A}
at wily.betterfurnaces.blockentity.BlockEntitySmeltingBase.tick(BlockEntitySmeltingBase.java:362) ~[BetterFurnacesReforged-1.18.1-1.2.4.jar%2362!/:1.18.1-1.2.4] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.chunk.LevelChunk$BoundTickingBlockEntity.m_142224_(LevelChunk.java:673) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.chunk.LevelChunk$RebindableTickingBlockEntityWrapper.m_142224_(LevelChunk.java:768) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.Level.m_46463_(Level.java:476) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:324) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A,re:mixin,pl:accesstransformer:B}
-- Block entity being ticked --
Details:
Name: betterfurnacesreforged:extreme_forge // wily.betterfurnaces.blockentity.BlockEntityExtremeForge
Block: Block{betterfurnacesreforged:extreme_forge}[colored=false,facing=up,lit=true,show_orientation=false,waterlogged=false]
Block location: World: (56,62,45), Section: (at 8,14,13 in 3,3,2; chunk contains blocks 48,-64,32 to 63,319,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
Block: Block{betterfurnacesreforged:extreme_forge}[colored=false,facing=up,lit=true,show_orientation=false,waterlogged=false]
Block location: World: (56,62,45), Section: (at 8,14,13 in 3,3,2; chunk contains blocks 48,-64,32 to 63,319,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
Stacktrace:
at net.minecraft.world.level.chunk.LevelChunk$BoundTickingBlockEntity.m_142224_(LevelChunk.java:673) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.chunk.LevelChunk$RebindableTickingBlockEntityWrapper.m_142224_(LevelChunk.java:768) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:epic_rei_lmao:A}
at net.minecraft.world.level.Level.m_46463_(Level.java:476) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:324) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A,re:mixin,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:868) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:808) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:120) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,xf:OptiFine:default,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:668) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:258) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at java.lang.Thread.run(Thread.java:833) [?:?] {}

-- Affected level --
Details:
All players: 0 total; []
Chunk stats: 20970
Level dimension: minecraft:overworld
Level spawn location: World: (0,92,0), Section: (at 0,12,0 in 0,5,0; chunk contains blocks 0,-64,0 to 15,319,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
Level time: 480592 game time, 64362 day time
Level name: 1.18 Revamped
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Level weather: Rain time: 40973 (now: false), thunder time: 76624 (now: false)
Known server brands: forge
Level was modded: true
Level storage version: 0x04ABD - Anvil
Stacktrace:
at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:868) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:808) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:120) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,xf:OptiFine:default,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:668) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:258) ~[client-1.18.1-20211210.034407-srg.jar%2397!/:?] {re:classloading,pl:accesstransformer:B,pl:epic_rei_lmao:A}
at java.lang.Thread.run(Thread.java:833) [?:?] {}

-- System Details --
Details:
Minecraft Version: 1.18.1
Minecraft Version ID: 1.18.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 17.0.1, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 8126235280 bytes (7749 MiB) / 10737418240 bytes (10240 MiB) up to 10737418240 bytes (10240 MiB)
CPUs: 12
Processor Vendor: GenuineIntel
Processor Name: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
Identifier: Intel64 Family 6 Model 165 Stepping 2
Microarchitecture: unknown
Frequency (GHz): 2.59
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 12
Graphics card #0 name: NVIDIA GeForce RTX 2070
Graphics card #0 vendor: NVIDIA (0x10de)
Graphics card #0 VRAM (MB): 4095.00
Graphics card #0 deviceId: 0x1f14
Graphics card #0 versionInfo: DriverVersion=27.21.14.6231
Graphics card #1 name: Intel(R) UHD Graphics
Graphics card #1 vendor: Intel Corporation (0x8086)
Graphics card #1 VRAM (MB): 1024.00
Graphics card #1 deviceId: 0x9bc4
Graphics card #1 versionInfo: DriverVersion=26.20.100.7642
Memory slot #0 capacity (MB): 8192.00
Memory slot #0 clockSpeed (GHz): 2.67
Memory slot #0 type: DDR4
Memory slot #1 capacity (MB): 8192.00
Memory slot #1 clockSpeed (GHz): 2.67
Memory slot #1 type: DDR4
Virtual memory max (MB): 42829.01
Virtual memory used (MB): 28505.43
Swap memory total (MB): 26624.00
Swap memory used (MB): 1617.25
JVM Flags: 10 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmn128M -Xmx10240M -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Server Running: true
Player Count: 0 / 8; []
Data Packs: vanilla, mod:configured (incompatible), mod:bno, mod:supermartijn642configlib, mod:simpleplanes (incompatible), mod:solarhelmet (incompatible), mod:betterfurnacesreforged (incompatible), mod:treeharvester, mod:wirelesschargers, mod:supermartijn642corelib, mod:tesseract, mod:scannable (incompatible), mod:forge, mod:easy_villagers, mod:curios, mod:collective, mod:ring_of_repair, mod:zerocore (incompatible), mod:bigreactors (incompatible), mod:justabattery (incompatible), mod:journeymap, file/anti enderman grief v1.1.2.zip, file/anti ghast grief v1.1.2.zip, file/armored elytra v1.0.5.zip, file/dragon drops v1.3.2.zip, file/redstone rotation wrench v1.1.3.zip, file/anti creeper grief v1.1.2.zip, mod:spawnermod (incompatible), mod:enchdesc, mod:ringsofascension (incompatible), mod:patchouli, mod:roughlyenoughitems (incompatible), mod:architectury (incompatible), mod:rei_internals_workaround (incompatible), mod:cloth_config (incompatible), mod:packedup, mod:oreexcavation, mod:solarenergy (incompatible), mod:oretweaker, mod:caelus, mod:refinedpipes, mod:mob_grinding_utils, mod:tlskincape (incompatible), mod:refinedstorage, mod:lightoverlay (incompatible)
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'forge'; Server brand changed to 'forge'
OptiFine Version: OptiFine_1.18.1_HD_U_H5_pre5
OptiFine Build: 20220208-201221
Render Distance Chunks: 23
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: (internal)
OpenGlVersion: 3.2.0 NVIDIA 462.31
OpenGlRenderer: GeForce RTX 2070/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 12
ModLauncher: 9.1.0+9.1.0+main.6690ee51
ModLauncher launch target: forgeclient
ModLauncher naming: srg
ModLauncher services:
mixin PLUGINSERVICE
eventbus PLUGINSERVICE
object_holder_definalize PLUGINSERVICE
runtime_enum_extender PLUGINSERVICE
capability_token_subclass PLUGINSERVICE
accesstransformer PLUGINSERVICE
runtimedistcleaner PLUGINSERVICE
mixin TRANSFORMATIONSERVICE
OptiFine TRANSFORMATIONSERVICE
fml TRANSFORMATIONSERVICE
FML Language Providers:
[email protected]
javafml@null
Mod List:
client-1.18.1-20211210.034407-srg.jar |Minecraft |minecraft |1.18.1 |DONE |Manifest: a1:d4:5e:04:4f:d3:d6:e0:7b:37:97:cf:77:b0:de:ad:4a:47:ce:8c:96:49:5f:0a:cf:8c:ae:b2:6d:4b:8a:3f
EnchantmentDescriptions-Forge-1.18.1-9.0.11.jar |EnchantmentDescriptions |enchdesc |9.0.11 |DONE |Manifest: eb:c4:b1:67:8b:f9:0c:db:dc:4f:01:b1:8e:61:64:39:4c:10:85:0b:a6:c4:c7:48:f0:fa:95:f2:cb:08:3a:e5
supermartijn642configlib-1.0.9-mc1.18.jar |SuperMartijn642's Config Lib |supermartijn642configlib |1.0.9 |DONE |Manifest: NOSIGNATURE
treeharvester_1.18.1-4.2.jar |Tree Harvester |treeharvester |4.2 |DONE |Manifest: NOSIGNATURE
refinedpipes-0.6.1.jar |Refined Pipes |refinedpipes |0.6.1 |DONE |Manifest: NOSIGNATURE
wirelesschargers-1.0.5-mc1.18.jar |wirelesschargers |wirelesschargers |1.0.5 |DONE |Manifest: NOSIGNATURE
supermartijn642corelib-1.0.16b-mc1.18.jar |SuperMartijn642's Core Lib |supermartijn642corelib |1.0.16b |DONE |Manifest: NOSIGNATURE
packedup-1.0.25-mc1.18.jar |PackedUp |packedup |1.0.25 |DONE |Manifest: NOSIGNATURE
tesseract-1.0.25-mc1.18.jar |Tesseract |tesseract |1.0.25 |DONE |Manifest: NOSIGNATURE
scannable-1.18.1-forge-1.7.6+da03abb.jar |Scannable |scannable |1.7.6 |DONE |Manifest: NOSIGNATURE
RoughlyEnoughItems-7.1.380.jar |Roughly Enough Items (REI) |roughlyenoughitems |7.1.380 |DONE |Manifest: NOSIGNATURE
caelus-forge-1.18-3.0.0.1.jar |Caelus API |caelus |1.18-3.0.0.1 |DONE |Manifest: NOSIGNATURE
easy_villagers-1.18.1-1.0.2.jar |Easy Villagers |easy_villagers |1.18.1-1.0.2 |DONE |Manifest: NOSIGNATURE
RingsOfAscension-1.18-1.0.0.jar |Rings of Ascension |ringsofascension |1.0.0 |DONE |Manifest: NOSIGNATURE
curios-forge-1.18.1-5.0.6.2.jar |Curios API |curios |1.18.1-5.0.6.2 |DONE |Manifest: NOSIGNATURE
Patchouli-1.18.1-65.jar |Patchouli |patchouli |1.18.1-65 |DONE |Manifest: NOSIGNATURE
collective-1.18.1-4.7.jar |Collective |collective |4.7 |DONE |Manifest: NOSIGNATURE
RingOfRepair-Forge-1.18.1-1.4.4.jar |Ring of Repair |ring_of_repair |1.4.4 |DONE |Manifest: NOSIGNATURE
journeymap-1.18.1-5.8.0beta17.jar |Journeymap |journeymap |5.8.0beta17 |DONE |Manifest: NOSIGNATURE
OreExcavation-1.10.160.jar |OreExcavation |oreexcavation |1.10.160 |DONE |Manifest: NOSIGNATURE
JustABattery-39.2.0.jar |JustABattery |justabattery |39.2.0 |DONE |Manifest: NOSIGNATURE
configured-1.5.3-1.18.1.jar |Configured |configured |1.5.3 |DONE |Manifest: NOSIGNATURE
BasicNetherOres-1.18.1-7.1.2.jar |Basic Nether Ores |bno |7.1.2 |DONE |Manifest: NOSIGNATURE
forge-branders-spawnermod-1.18-1.8.14.jar |Enhanced Mob Spawners |spawnermod |1.8.14 |DONE |Manifest: NOSIGNATURE
simpleplanes-1.18.1-4.11.1.jar |Simple Planes |simpleplanes |1.18.1-4.11.1 |DONE |Manifest: NOSIGNATURE
SolarHelmet-1.18-38.0.0.jar |SolarHelmet |solarhelmet |38.0.0 |DONE |Manifest: NOSIGNATURE
solarenergy-1.18.1-0.4.0.3.jar |Solar Energy |solarenergy |0.4.0.3 |DONE |Manifest: NOSIGNATURE
BetterFurnacesReforged-1.18.1-1.2.4.jar |BetterFurnaces Reforged |betterfurnacesreforged |1.18.1-1.2.4 |DONE |Manifest: NOSIGNATURE
architectury-3.7.31.jar |Architectury |architectury |3.7.31 |DONE |Manifest: NOSIGNATURE
RoughlyEnoughItems-jei-internals-workaround-7.3.44|REI Internals Workaround |rei_internals_workaround |7.3.443 |DONE |Manifest: NOSIGNATURE
light-overlay-6.0.4-forge.jar |Light Overlay |lightoverlay |6.0.4 |DONE |Manifest: NOSIGNATURE
cloth-config-6.1.50-forge.jar |Cloth Config v4 API |cloth_config |6.1.50 |DONE |Manifest: NOSIGNATURE
forge-1.18.1-39.0.88-universal.jar |Forge |forge |39.0.88 |DONE |Manifest: 84:ce:76:e8:45:35:e4:0e:63:86:df:47:59:80:0f:67:6c:c1:5f:6e:5f:4d:b3:54:47:1a:9f:7f:ed:5e:f2:90
tl_skin_cape_forge_1.18_1.18.1-1.24.jar |TLSkinCape |tlskincape |1.24 |DONE |Manifest: 19:f5:ce:44:81:0c:e4:22:05:5e:73:c5:a8:cd:de:f3:c8:cf:a9:b3:01:70:40:a0:ee:2d:50:7a:1c:3d:1c:8a
mob_grinding_utils-1.18.1-0.4.33.jar |Mob Grinding Utils |mob_grinding_utils |1.18.1-0.4.33 |DONE |Manifest: NOSIGNATURE
refinedstorage-1.10.0.jar |Refined Storage |refinedstorage |1.10.0 |DONE |Manifest: NOSIGNATURE
ZeroCore2-1.18.1-2.1.11.jar |Zero CORE 2 |zerocore |1.18.1-2.1.11 |DONE |Manifest: NOSIGNATURE
ExtremeReactors2-1.18.1-2.0.38.jar |Extreme Reactors |bigreactors |1.18.1-2.0.38 |DONE |Manifest: NOSIGNATURE
OreTweaker-1.18.1-3.0.2.jar |Ore Tweaker |oretweaker |3.0.2 |DONE |Manifest: NOSIGNATURE
Crash Report UUID: 7951eff8-0759-4a46-801e-e20a45e8f792
FML: 39.0
Forge: net.minecraftforge:39.0.88

Apparently you are using the Xp Tank Upgrade, I could say that it is an incompatibility with some mod, but I would need to know every detail for this crash to occur in your Extreme Forge (like the items you had in the forge) and try to reproduce this in my tests.

Thank you very much for reporting the bug, I already fixed it apparently in the last version of the mod that I didn't release on CurseForge.

#60