Description of the Bug Encountered
I put together a 1.21.1 modpack to play with friends on a server and for some reason, a couple days into the world it started crashing and continues crashing after someone is in the world for a couple minutes. Not sure if it's specifically Wilder Wilds causing it but after removing it from the pack, the issue stopped happening.

Logs
---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 2025-05-22 22:13:51
Description: Exception ticking world

java.lang.NullPointerException: Cannot invoke "net.minecraft.class_2338.method_10062()" because "$$3" is null
at knot//net.minecraft.class_7159.method_41703(class_7159.java:42)
at knot//net.minecraft.class_3218.method_41410(class_3218.java:1059)
at knot//net.minecraft.class_2266.method_9514(class_2266.java:1553)
at knot//net.minecraft.class_4970$class_4971.mixinextras$bridge$method_9514$125(class_4970.java)
at knot//net.minecraft.class_4970$class_4971.wrapOperation$dpi000$frozenlib$frozenLib$runCustomRandomTick(class_4970.java:1917)
at knot//net.minecraft.class_4970$class_4971.mixinextras$bridge$wrapOperation$dpi000$frozenlib$frozenLib$runCustomRandomTick$127(class_4970.java)
at knot//net.minecraft.class_4970$class_4971.wrapOperation$gpg000$wilderwild$wilderWild$randomTick(class_4970.java:3522)
at knot//net.minecraft.class_4970$class_4971.method_26199(class_4970.java:1153)
at knot//net.minecraft.class_3218.method_18203(class_3218.java:519)
at knot//net.minecraft.class_3215.method_14161(class_3215.java:365)
at knot//net.minecraft.class_3215.method_12127(class_3215.java:310)
at knot//net.minecraft.class_3218.method_18765(class_3218.java:350)
at knot//net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:1021)
at knot//net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:912)
at knot//net.minecraft.class_1132.method_3748(class_1132.java:114)
at knot//net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:697)
at knot//net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:281)
at java.base/java.lang.Thread.run(Thread.java:1583)

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

-- Head --
Thread: Server thread
Stacktrace:
at knot//net.minecraft.class_7159.method_41703(class_7159.java:42)
at knot//net.minecraft.class_3218.method_41410(class_3218.java:1059)
at knot//net.minecraft.class_2266.method_9514(class_2266.java:1553)
at knot//net.minecraft.class_4970$class_4971.mixinextras$bridge$method_9514$125(class_4970.java)
at knot//net.minecraft.class_4970$class_4971.wrapOperation$dpi000$frozenlib$frozenLib$runCustomRandomTick(class_4970.java:1917)
at knot//net.minecraft.class_4970$class_4971.mixinextras$bridge$wrapOperation$dpi000$frozenlib$frozenLib$runCustomRandomTick$127(class_4970.java)
at knot//net.minecraft.class_4970$class_4971.wrapOperation$gpg000$wilderwild$wilderWild$randomTick(class_4970.java:3522)
at knot//net.minecraft.class_4970$class_4971.method_26199(class_4970.java:1153)
at knot//net.minecraft.class_3218.method_18203(class_3218.java:519)
at knot//net.minecraft.class_3215.method_14161(class_3215.java:365)
at knot//net.minecraft.class_3215.method_12127(class_3215.java:310)

-- Affected level --
Details:
All players: 1 total; [class_3222['DatDoggerBoi'/6, l='ServerLevel[Shitty Modpack Testing]', x=-8571.75, y=64.65, z=6991.37]]
Chunk stats: 9122
Level dimension: minecraft:overworld
Level spawn location: World: (-64,64,-80), Section: (at 0,0,0 in -4,4,-5; chunk contains blocks -64,-64,-80 to -49,319,-65), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,-64,-512 to -1,319,-1)
Level time: 153980 game time, 4609 day time
Level name: Shitty Modpack Testing
Level game mode: Game mode: creative (ID 1). Hardcore: false. Commands: true
Level weather: Rain time: 119332 (now: false), thunder time: 73891 (now: false)
Known server brands: fabric
Removed feature flags:
Level was modded: true
Level storage version: 0x04ABD - Anvil
Loaded entity count: 945
Stacktrace:
at knot//net.minecraft.class_3218.method_8538(class_3218.java:1693)
at knot//net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:1024)
at knot//net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:912)
at knot//net.minecraft.class_1132.method_3748(class_1132.java:114)
at knot//net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:697)
at knot//net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:281)
at java.base/java.lang.Thread.run(Thread.java:1583)

-- System Details --
Details:
Minecraft Version: 1.21.1
Minecraft Version ID: 1.21.1
Operating System: Windows 11 (amd64) version 10.0
Java Version: 21.0.7, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 2373025832 bytes (2263 MiB) / 6442450944 bytes (6144 MiB) up to 8589934592 bytes (8192 MiB)
CPUs: 12
Processor Vendor: GenuineIntel
Processor Name: 12th Gen Intel(R) Core(TM) i5-12400F
Identifier: Intel64 Family 6 Model 151 Stepping 2
Microarchitecture: Alder Lake
Frequency (GHz): 2.50
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 12
Graphics card #0 name: NVIDIA GeForce RTX 3060
Graphics card #0 vendor: NVIDIA
Graphics card #0 VRAM (MiB): 12288.00
Graphics card #0 deviceId: VideoController1
Graphics card #0 versionInfo: 32.0.15.6603
Memory slot #0 capacity (MiB): 8192.00
Memory slot #0 clockSpeed (GHz): 3.47
Memory slot #0 type: DDR4
Memory slot #1 capacity (MiB): 8192.00
Memory slot #1 clockSpeed (GHz): 3.47
Memory slot #1 type: DDR4
Virtual memory max (MiB): 39777.88
Virtual memory used (MiB): 26941.88
Swap memory total (MiB): 23552.00
Swap memory used (MiB): 815.56
Space in storage for jna.tmpdir (MiB): available: 177542.86, total: 952550.00
Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 177542.86, total: 952550.00
Space in storage for io.netty.native.workdir (MiB): available: 177542.86, total: 952550.00
Space in storage for java.io.tmpdir (MiB): available: 177542.86, total: 952550.00
Space in storage for workdir (MiB): available: 177542.86, total: 952550.00
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx8G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
amendments: Amendments 1.21-1.2.24
antique_atlas: Antique Atlas 2.11.2+1.21
appleskin: AppleSkin 3.0.6+mc1.21
architectury: Architectury 13.0.8
armorstatues: Armor Statues 21.1.0
statuemenus: Statue Menus 21.1.0
arts_and_crafts: Arts & Crafts 1.4.3
blue_endless_jankson: jankson 1.2.3
automobility: Automobility 0.5.0.h
de_javagl_obj: obj 0.4.0
jsonem: JsonEM 0.3+1.21
balm: Balm 21.0.45
kuma_api: KumaAPI 21.0.5
beautify: Beautify 1.3.0+1.21.1
beekeeperhut: Friends&Foes - Beekeeper Hut 3.0.0
better_mcdonalds_mod: Better McDonald's Mod 4.4.2+1.21.1
betterarcheology: Better Archeology 1.3.2
betterladdersmod: Better Ladders 0.0.3.1.21
blazingbamboocontinued: Blazing Bamboo Continued 1.1.3-1.21.1
bookshelf: Bookshelf 21.1.62
bosses_of_mass_destruction: Bosses of Mass Destruction (Beta) 1.10.2-1.21.1
multipart_entities: MultipartEntities 1.7-1.21
cardinal-components: Cardinal Components API 6.1.2
cardinal-components-base: Cardinal Components API (base) 6.1.2
cardinal-components-block: Cardinal Components API (blocks) 6.1.2
cardinal-components-chunk: Cardinal Components API (chunks) 6.1.2
cardinal-components-entity: Cardinal Components API (entities) 6.1.2
cardinal-components-item: Cardinal Components API (items) 6.1.2
cardinal-components-level: Cardinal Components API (world saves) 6.1.2
cardinal-components-scoreboard: Cardinal Components API (scoreboard) 6.1.2
cardinal-components-world: Cardinal Components API (worlds) 6.1.2
chat_heads: Chat Heads 0.13.18
chisel: Chisel Refabricated 2.0.0+mc1.21.1
cinderscapes: Cinderscapes 5.0.2
biolith: Biolith 3.0.0
cinderscapes-client: Cinderscapes: Client 5.0.2
cinderscapes-common: Cinderscapes: Common 5.0.2
cinderscapes-worldgen: Cinderscapes: World Generation 5.0.2
terraform-biome-remapper-api-v1: Terraform Biome Remapper API (v1) 11.0.0
terraform-shapes-api-v1: Terraform Shapes API (v1) 11.0.0
terraform-surfaces-api-v1: Terraform Surfaces API (v1) 11.0.0
terraform-wood-api-v1: Terraform Wood API (v1) 11.0.0
cloth-config: Cloth Config v15 15.0.140
cloth-basic-math: cloth-basic-math 0.6.1
comforts: Comforts 9.0.3+1.21.1
spectrelib: SpectreLib 0.17.2+1.21
connectiblechains: Connectible Chains 2.5.3+1.21.1
continuity: Continuity 3.0.0+1.21
coroutil: CoroUtil 1.21.1-1.3.8
cpm: Customizable Player Models 0.6.22a
creativecore: CreativeCore 2.13.1
net_neoforged_bus: bus 7.2.0
creeperoverhaul: Creeper Overhaul 4.0.6
com_teamresourceful_resourceful-cosmetics-4j: resourceful-cosmetics-4j 1.0.3
cryonicconfig: Cryonic Config 1.0.0+mc1.21.4
cull-less-leaves: Cull Less Leaves 1.4.2+1.21-fabric
cutthrough: Cut Through 21.1.0
dramaticdoors: Dramatic Doors (NeoQuiFab) 1.21.1-3.3.2
dummmmmmy: MmmMmmMmmMmm 1.21-2.0.7
easyanvils: Easy Anvils 21.1.0
elytratrims: Elytra Trims 3.5.6
conditional-mixin: conditional mixin 0.6.3
mixinsquared: MixinSquared 0.1.2-beta.4
enchancement: Enchancement 1.21-r14
midnightlib: MidnightLib 1.6.3
tooltipfix: ToolTip Fix 1.1.1-1.20
enchdesc: EnchantmentDescriptions 21.1.7
enderscape: Enderscape 1.0.4+1.21.1
mixson: Mixson 1.3.2
endrem: End Remastered 6.0.2
ends_delight: End's Delight 2.5.2+refabricated.1.21.1
exposure: Exposure 1.9.3
fabric-api: Fabric API 0.116.0+1.21.1
fabric-api-base: Fabric API Base 0.4.42+6573ed8c19
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.71+b559734419
fabric-biome-api-v1: Fabric Biome API (v1) 13.0.31+d527f9fd19
fabric-block-api-v1: Fabric Block API (v1) 1.0.22+0af3f5a719
fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.11+ebb2264e19
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.52+0af3f5a719
fabric-client-tags-api-v1: Fabric Client Tags 1.1.15+6573ed8c19
fabric-command-api-v1: Fabric Command API (v1) 1.2.49+f71b366f19
fabric-command-api-v2: Fabric Command API (v2) 2.2.28+6ced4dd919
fabric-commands-v0: Fabric Commands (v0) 0.2.66+df3654b319
fabric-content-registries-v0: Fabric Content Registries (v0) 8.0.19+b559734419
fabric-convention-tags-v1: Fabric Convention Tags 2.1.5+7f945d5b19
fabric-convention-tags-v2: Fabric Convention Tags (v2) 2.11.1+a406e79519
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.2.29+0af3f5a719
fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.4.3+a15b7ead19
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 20.2.29+16c4ae2519
fabric-dimensions-v1: Fabric Dimensions API (v1) 4.0.0+6fc22b9919
fabric-entity-events-v1: Fabric Entity Events (v1) 1.7.0+2122d82819
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.7.13+ba9dae0619
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.53+6ced4dd919
fabric-item-api-v1: Fabric Item API (v1) 11.1.1+d5debaed19
fabric-item-group-api-v1: Fabric Item Group API (v1) 4.1.7+def88e3a19
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.47+0af3f5a719
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.45+df3654b319
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.6.0+0865547519
fabric-loot-api-v2: Fabric Loot API (v2) 3.0.15+3f89f5a519
fabric-loot-api-v3: Fabric Loot API (v3) 1.0.3+3f89f5a519
fabric-message-api-v1: Fabric Message API (v1) 6.0.13+6573ed8c19
fabric-model-loading-api-v1: Fabric Model Loading API (v1) 2.0.0+fe474d6b19
fabric-networking-api-v1: Fabric Networking API (v1) 4.3.0+c7469b2119
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 15.2.1+40875a9319
fabric-particles-v1: Fabric Particles (v1) 4.0.2+6573ed8c19
fabric-recipe-api-v1: Fabric Recipe API (v1) 5.0.14+248df81c19
fabric-registry-sync-v0: Fabric Registry Sync (v0) 5.2.0+34f5d91419
fabric-renderer-api-v1: Fabric Renderer API (v1) 3.4.0+c705a49c19
fabric-renderer-indigo: Fabric Renderer - Indigo 1.7.0+c705a49c19
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.68+df3654b319
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.49+73761d2e19
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.1.6+1daea21519
fabric-rendering-v0: Fabric Rendering (v0) 1.1.71+df3654b319
fabric-rendering-v1: Fabric Rendering (v1) 5.0.5+df16efd019
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 4.3.0+8dc279b119
fabric-resource-loader-v0: Fabric Resource Loader (v0) 1.3.1+5b5275af19
fabric-screen-api-v1: Fabric Screen API (v1) 2.0.25+8b68f1c719
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.88+b559734419
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.23+6573ed8c19
fabric-transfer-api-v1: Fabric Transfer API (v1) 5.4.3+c24bd99419
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 6.2.0+45b9699719
fabric-language-kotlin: Fabric Language Kotlin 1.13.3+kotlin.2.1.21
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 2.1.21
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 2.1.21
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 2.1.21
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 2.1.21
org_jetbrains_kotlinx_atomicfu-jvm: atomicfu-jvm 0.27.0
org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.10.2
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.10.2
org_jetbrains_kotlinx_kotlinx-datetime-jvm: kotlinx-datetime-jvm 0.6.2
org_jetbrains_kotlinx_kotlinx-io-bytestring-jvm: kotlinx-io-bytestring-jvm 0.7.0
org_jetbrains_kotlinx_kotlinx-io-core-jvm: kotlinx-io-core-jvm 0.7.0
org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm: kotlinx-serialization-cbor-jvm 1.8.1
org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.8.1
org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.8.1
fabricloader: Fabric Loader 0.16.14
mixinextras: MixinExtras 0.4.1
farmersdelight: Farmer's Delight 1.21.1-3.0.4+refabricated
mm: Manningham Mills 2.3
fence_on_slab: Fence On Slab! 1.0.0
fishofthieves: Fish of Thieves 4.1.2
flowerymooblooms: Friends&Foes - Flowery Mooblooms 3.0.0
forgeconfigapiport: Forge Config API Port 21.1.3
com_electronwill_night-config_core: core 3.8.0
com_electronwill_night-config_toml: toml 3.8.0
friendsandfoes: Friends&Foes 4.0.5
frozenlib: FrozenLib 2.1.3-mc1.21.1
fzzy_config: Fzzy Config 0.6.9+1.21
fabric-permissions-api-v0: fabric-permissions-api 0.3.1
net_peanuuutz_tomlkt_tomlkt-jvm: tomlkt-jvm 0.3.7
geckolib: GeckoLib 4 4.7.5.1
gildedsherds: GildedSherds 21.1.3
handcrafted: Handcrafted 4.0.3
hangglider: Hang Glider 21.1.0
hauntedharvest: Haunted Harvest 1.21-3.3.3
hopobetterruinedportal: Hopo Better Ruined Portal 1.4.4
indium: Indium 1.0.35+mc1.21
java: OpenJDK 64-Bit Server VM 21
jei: Just Enough Items 19.21.1.304
jinxedlib: JinxedLib 1.0.3
lootr: Lootr 1.21-1.10.35.91
mcwbridges: Macaw's Bridges 3.1.0
mcwdoors: Macaw's Doors 1.1.2
mcwfences: Macaw's Fences and Walls 1.2.0
mcwlights: Macaw's Lights and Lamps 1.1.2
mcwpaths: Macaw's Paths and Pavings 1.1.0
mcwtrpdoors: Macaw's Trapdoors 1.1.4
mcwwindows: Macaw's Windows 2.3.2
minecraft: Minecraft 1.21.1
modelfix: Model Gap Fix 1.21-1.6
modmenu: Mod Menu 11.0.3
moonlight: Moonlight Lib 1.21-2.18.13
mr_dungeons_andtaverns: Dungeons and Taverns 1-v4.4.4
mr_dungeons_andtavernsancientcityoverhaul: Dungeons and Taverns Ancient City Overhaul 1-v2
mr_dungeons_andtavernsdeserttemplereplacement: Dungeons and Taverns Desert Temple Replacement 1-v1.2
mr_dungeons_andtavernsjungletemplereplacement: Dungeons and Taverns Jungle Temple Replacement 1-v1.2
mr_dungeons_andtavernsnetherfortressoverhaul: Dungeons and Taverns Nether Fortress Overhaul 1-v2.4
mr_dungeons_andtavernsoceanmonumentreplacement: Dungeons and Taverns Ocean Monument Replacement 1-v1.2
mr_dungeons_andtavernsstrongholdoverhaul: Dungeons and Taverns Stronghold Overhaul 1-v2.1.f
mr_true_ending: True Ending: Ender Dragon Overhaul 1-v1.1.2d
musketmod: Musket Mod 1.5.4
mynethersdelight: My Nether's Delight 1.21.1-2.0.3+1.7.8.refabricated
natures_delight: Nature's Delight 1.10-1.21.1
natures_spirit: Nature's Spirit 2.2.4-1.21.1
naturescompass: Nature's Compass 1.21.1-2.2.7-fabric
netherchested: Nether Chested 21.1.0
limitlesscontainers: Limitless Containers 21.1.0
netherdepthsupgrade: Nether Depths Upgrade 3.1.9+1.21-fabric
origins: Origins 1.13.0-alpha.12+mc.1.21.1
apoli: Apoli 2.12.0-alpha.15+mc.1.21.1
additionalentityattributes: Additional Entity Attributes 1.8.0+1.21
calio: Calio 1.14.0-alpha.9+mc.1.21.x
playerabilitylib: Pal 1.10.0
perfect-parity-pg: Perfect Parity Pale Garden Edition 1.0.3
perfectparity: Perfect Parity 1.1.5
placeholder-api: Placeholder API 2.4.2+1.21
polymorph: Polymorph 1.0.10+1.21.1
presencefootsteps: Presence Footsteps 1.11.0+1.21
kirin: Kirin UI 1.20.0+1.21
prickle: PrickleMC 21.1.8
puzzleslib: Puzzles Lib 21.1.36
resourcefulconfig: Resourcefulconfig 3.0.11
resourcefullib: Resourceful Lib 3.0.12
com_teamresourceful_bytecodecs: bytecodecs 1.1.2
com_teamresourceful_yabn: yabn 1.0.3
ribbits: Ribbits 1.21.1-Fabric-4.1.2
org_reflections_reflections: reflections 0.10.2
rusticdelight: Rustic Delight 1.4.0
sawmill: Universal Sawmill 1.21-1.5.18
snowyspirit: Snowy Spirit 1.21.1-3.0.16
sodium: Sodium 0.5.11+mc1.21
status-effect-bars: Status Effect Bars 1.0.6
storagedelight: Storage Delight 25.3.9-1.21-fabric
structory: Structory 1.3.10
subtle_effects: Subtle Effects 1.9.4-hotfix.1
supplementaries: Supplementaries 1.21-3.1.7
surveyor: Surveyor Map Framework 0.6.26+1.21
folk_sisby_kaleido-config: kaleido-config 0.3.1+1.3.2
takesapillage: It Takes a Pillage Continuation 1.0.6
technomodel: technomodel 1.0.5
terrablender: TerraBlender 4.1.0.8
tide: Tide 1.6.0
trailiertales: Trailier Tales 1.1.7-mc1.21.1
travelersbackpack: Traveler's Backpack 10.1.22
waterframes: WaterFrames 2.1.12c
watermedia: WaterMedia 2.1.24
watut: What Are They Up To 1.21.0-1.2.7
waystones: Waystones 21.1.19
wilderwild: Wilder Wild 4.0.10-mc1.21.1
xercamusic: Music Maker Mod 1.21.1-1.0.0
xercapaint: Joy of Painting 1.21.1-1.0.1
yet_another_config_lib_v3: YetAnotherConfigLib 3.6.6+1.21.1-fabric
com_twelvemonkeys_common_common-image: common-image 3.12.0
com_twelvemonkeys_common_common-io: common-io 3.12.0
com_twelvemonkeys_common_common-lang: common-lang 3.12.0
com_twelvemonkeys_imageio_imageio-core: imageio-core 3.12.0
com_twelvemonkeys_imageio_imageio-metadata: imageio-metadata 3.12.0
com_twelvemonkeys_imageio_imageio-webp: imageio-webp 3.12.0
org_quiltmc_parsers_gson: gson 0.2.1
org_quiltmc_parsers_json: json 0.2.1
yungsapi: YUNG's API 1.21.1-Fabric-5.1.5
org_javassist_javassist: javassist 3.29.2-GA
Server Running: true
Player Count: 1 / 8; [class_3222['DatDoggerBoi'/6, l='ServerLevel[Shitty Modpack Testing]', x=-8571.75, y=64.65, z=6991.37]]
Active Data Packs: vanilla, fabric, additionalentityattributes, amendments, apoli, arts_and_crafts, automobility, balm (incompatible), beautify, beekeeperhut, better_mcdonalds_mod, betterarcheology, blazingbamboocontinued, bookshelf (incompatible), bosses_of_mass_destruction, chisel, cinderscapes-common, comforts (incompatible), connectiblechains, creeperoverhaul, dramaticdoors (incompatible), dummmmmmy, easyanvils (incompatible), elytratrims (incompatible), enchancement, enderscape, endrem (incompatible), ends_delight, exposure, fabric-convention-tags-v2, farmersdelight, fishofthieves, flowerymooblooms, friendsandfoes, frozenlib, gildedsherds (incompatible), handcrafted, hangglider (incompatible), hauntedharvest, hopobetterruinedportal, lootr, mcwbridges (incompatible), mcwdoors (incompatible), mcwfences (incompatible), mcwlights (incompatible), mcwpaths, mcwtrpdoors (incompatible), mcwwindows (incompatible), moonlight, mr_dungeons_andtaverns, mr_dungeons_andtavernsancientcityoverhaul, mr_dungeons_andtavernsdeserttemplereplacement, mr_dungeons_andtavernsjungletemplereplacement, mr_dungeons_andtavernsnetherfortressoverhaul, mr_dungeons_andtavernsoceanmonumentreplacement, mr_dungeons_andtavernsstrongholdoverhaul, mr_true_ending, musketmod (incompatible), mynethersdelight (incompatible), natures_delight, natures_spirit, naturescompass, netherchested (incompatible), netherdepthsupgrade, origins, perfect-parity-pg, perfectparity, ribbits (incompatible), rusticdelight, sawmill, snowyspirit, storagedelight, structory, supplementaries, takesapillage, terrablender (incompatible), tide (incompatible), trailiertales, travelersbackpack, waterframes (incompatible), waystones (incompatible), wilderwild, xercamusic, xercapaint (incompatible), yungsapi (incompatible), natures_spirit:modified_flower_forest (incompatible), natures_spirit:modified_windswept_hills (incompatible), natures_spirit:modified_badlands (incompatible), natures_spirit:arts_and_crafts_dat (incompatible), natures_spirit:modified_savannas (incompatible), enderscape:fix_vanilla_recipes, natures_spirit:modified_jungle (incompatible), natures_spirit:modified_birch_forest (incompatible), enderscape:fix_levitation_advancement, natures_spirit:modified_swamp (incompatible), natures_spirit:modified_dark_forest (incompatible), natures_spirit:modified_mountain_biomes (incompatible), natures_spirit:modified_desert (incompatible), enderscape:new_end_cities, enderscape:new_terrain, moonlight:mods_dynamic_assets, sawmill:sawmill_recipes, snowyspirit:generated_pack, supplementaries:generated_pack
Available Data Packs: additionalentityattributes, amendments, apoli, arts_and_crafts, automobility, balm (incompatible), beautify, beekeeperhut, better_mcdonalds_mod, betterarcheology, blazingbamboocontinued, bookshelf (incompatible), bosses_of_mass_destruction, bundle, chisel, cinderscapes-common, comforts (incompatible), connectiblechains, creeperoverhaul, dramaticdoors (incompatible), dummmmmmy, easyanvils (incompatible), elytratrims (incompatible), enchancement, enderscape, enderscape:fix_levitation_advancement, enderscape:fix_vanilla_recipes, enderscape:new_end_cities, enderscape:new_terrain, endrem (incompatible), ends_delight, exposure, fabric, fabric-convention-tags-v2, farmersdelight, fishofthieves, fishofthieves:simple_spawning_condition_pack, flowerymooblooms, friendsandfoes, frozenlib, gildedsherds (incompatible), handcrafted, hangglider (incompatible), hauntedharvest, hopobetterruinedportal, lootr, mcwbridges (incompatible), mcwdoors (incompatible), mcwfences (incompatible), mcwlights (incompatible), mcwpaths, mcwtrpdoors (incompatible), mcwwindows (incompatible), moonlight, moonlight:mods_dynamic_assets, mr_dungeons_andtaverns, mr_dungeons_andtavernsancientcityoverhaul, mr_dungeons_andtavernsdeserttemplereplacement, mr_dungeons_andtavernsjungletemplereplacement, mr_dungeons_andtavernsnetherfortressoverhaul, mr_dungeons_andtavernsoceanmonumentreplacement, mr_dungeons_andtavernsstrongholdoverhaul, mr_true_ending, musketmod (incompatible), mynethersdelight (incompatible), natures_delight, natures_spirit, natures_spirit:arts_and_crafts_dat (incompatible), natures_spirit:modified_badlands (incompatible), natures_spirit:modified_birch_forest (incompatible), natures_spirit:modified_dark_forest (incompatible), natures_spirit:modified_desert (incompatible), natures_spirit:modified_flower_forest (incompatible), natures_spirit:modified_jungle (incompatible), natures_spirit:modified_mountain_biomes (incompatible), natures_spirit:modified_savannas (incompatible), natures_spirit:modified_swamp (incompatible), natures_spirit:modified_vanilla_trees (incompatible), natures_spirit:modified_windswept_hills (incompatible), naturescompass, netherchested (incompatible), netherdepthsupgrade, origins, perfect-parity-pg, perfectparity, ribbits (incompatible), rusticdelight, sawmill, sawmill:sawmill_recipes, snowyspirit, snowyspirit:generated_pack, storagedelight, structory, supplementaries, supplementaries:generated_pack, takesapillage, terrablender (incompatible), tide (incompatible), trade_rebalance, trailiertales, trailiertales:stronghold_catacombs, travelersbackpack, vanilla, waterframes (incompatible), waystones (incompatible), wilderwild, xercamusic, xercapaint (incompatible), yungsapi (incompatible)
Enabled Feature Flags: wilderwild:trailiertales, minecraft:vanilla
World Generation: Stable
World Seed: 1533167896910298932
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fabric'; Server brand changed to 'fabric'
Launched Version: fabric-loader-0.16.14-1.21.1

Additional context
Add any other context about the problem here.

We had a similar report about this a week or two ago. This is not our issue, and I've even confirmed that with the maintainer of Lithium.
Please take a look at your other mods.
There was one that modified something with Cacti that caused a crash, though I believe it's since been updated?