Describe what you were doing before the crash

I were fighting a hirschgeist.
[eg. Loading game, creating world, spawning a certain mob, hurting a mob, walking around]

To Reproduce

Steps to reproduce the behavior (if possible):

1. Spawn '...'
2. Click on '....'
3. See error

Crash Log (REQUIRED)

Description: Ticking entity

java.lang.IllegalAccessError: tried to access class net.minecraft.world.server.ChunkManager$EntityTracker from class dev.itsmeow.whisperwoods.entity.EntityWisp
at dev.itsmeow.whisperwoods.entity.EntityWisp.func_70071_h_(EntityWisp.java:112) ~[whisperwoods:1.16.5-2.1.0] {re:classloading}
at net.minecraft.world.server.ServerWorld.func_217479_a(ServerWorld.java:611) ~[?:?] {re:classloading,re:mixin}
at net.minecraft.world.World.func_217390_a(World.java:554) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.world.server.ServerWorld.func_72835_b(ServerWorld.java:404) ~[?:?] {re:classloading,re:mixin}
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:851) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:78) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232) ~[?:?] {re:classloading,pl:accesstransformer:B}
at java.lang.Thread.run(Unknown Source) [?:1.8.0_291] {}

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

-- Head --
Thread: Server thread
Stacktrace:
at dev.itsmeow.whisperwoods.entity.EntityWisp.func_70071_h_(EntityWisp.java:112) ~[whisperwoods:1.16.5-2.1.0] {re:classloading}
at net.minecraft.world.server.ServerWorld.func_217479_a(ServerWorld.java:611) ~[?:?] {re:classloading,re:mixin}
-- Entity being ticked --
Details:
Entity Type: whisperwoods:wisp (dev.itsmeow.whisperwoods.entity.EntityWisp)
Entity ID: 11
Entity Name: Wisp
Entity's Exact location: -8.55, 7.93, 116.45
Entity's Block location: World: (-9,7,116), Chunk: (at 7,0,4 in -1,7; contains blocks -16,0,112 to -1,255,127), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Entity's Momentum: -0.02, -0.09, -0.02
Entity's Passengers: []
Entity's Vehicle: ERROR NullPointerException: null
Stacktrace:
at net.minecraft.world.World.func_217390_a(World.java:554) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.world.server.ServerWorld.func_72835_b(ServerWorld.java:404) ~[?:?] {re:classloading,re:mixin}

-- Affected level --
Details:
All players: 1 total; [ServerPlayerEntity['ksktz'/3, l='ServerLevel[新的世界]', x=-13.66, y=4.00, z=109.45]]
Chunk stats: ServerChunkCache: 2254
Level dimension: minecraft:overworld
Level spawn location: World: (-48,4,112), Chunk: (at 0,0,0 in -3,7; contains blocks -48,0,112 to -33,255,127), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 7470 game time, 13175 day time
Level name: 新的世界
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Level weather: Rain time: 54300 (now: false), thunder time: 133469 (now: false)
Known server brands: forge
Level was modded: true
Level storage version: 0x04ABD - Anvil
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:851) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:78) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232) ~[?:?] {re:classloading,pl:accesstransformer:B}
at java.lang.Thread.run(Unknown Source) [?:1.8.0_291] {}

-- System Details --
Details:
Minecraft Version: 1.16.5
Minecraft Version ID: 1.16.5
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_291, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 9092026712 bytes (8670 MB) / 9661579264 bytes (9214 MB) up to 9663676416 bytes (9216 MB)
CPUs: 8
JVM Flags: 7 total; -XX:+UseG1GC -XX:-UseAdaptiveSizePolicy -XX:-OmitStackTraceInFastThrow -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -XX:+IgnoreUnrecognizedVMOptions -Xmn256m -Xmx9216m
ModLauncher: 8.1.3+8.1.3+main-8.1.x.c94d18ec
ModLauncher launch target: fmlclient
ModLauncher naming: srg
ModLauncher services:
/mixin-0.8.4.jar mixin PLUGINSERVICE
/eventbus-4.0.0.jar eventbus PLUGINSERVICE
/forge-1.16.5-36.2.34.jar object_holder_definalize PLUGINSERVICE
/forge-1.16.5-36.2.34.jar runtime_enum_extender PLUGINSERVICE
/accesstransformers-3.0.1.jar accesstransformer PLUGINSERVICE
/forge-1.16.5-36.2.34.jar capability_inject_definalize PLUGINSERVICE
/forge-1.16.5-36.2.34.jar runtimedistcleaner PLUGINSERVICE
/mixin-0.8.4.jar mixin TRANSFORMATIONSERVICE
/forge-1.16.5-36.2.34.jar fml TRANSFORMATIONSERVICE
FML: 36.2
Forge: net.minecraftforge:36.2.34
FML Language Providers:
[email protected]
minecraft@1
Mod List:
forge-1.16.5-36.2.34-client.jar |Minecraft |minecraft |1.16.5 |DONE |Manifest: NOSIGNATURE
forge-1.16.5-36.2.34-universal.jar |Forge |forge |36.2.34 |DONE |Manifest: 22:af:21:d8:19:82:7f:93:94:fe:2b:ac:b7:e4:41:57:68:39:87:b1:a7:5c:c6:44:f9:25:74:21:14:f5:0d:90
torohealth-1.16.4-forge-4.jar |ToroHealth |torohealth |NONE |DONE |Manifest: NOSIGNATURE
whisperwoods-1.16.5-2.1.0-forge.jar |Whisperwoods |whisperwoods |1.16.5-2.1.0 |DONE |Manifest: NOSIGNATURE
architectury-1.32.63.jar |Architectury |architectury |1.32.63 |DONE |Manifest: NOSIGNATURE
Crash Report UUID: 936fc7ec-ceea-4950-bcab-b10a82ee7cb6
Player Count: 1 / 8; [ServerPlayerEntity['ksktz'/3, l='ServerLevel[新的世界]', x=-13.66, y=4.00, z=109.45]]
Data Packs: vanilla, mod:forge, mod:torohealth, mod:whisperwoods, mod:architectury
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'forge'
Get your minecraft crash log and paste it here.

Versions

• Minecraft Version:1.16.5
• Architectury API Version:1.32.63
• Platform (Forge/Fabric):forge
• Forge Version:36.2.34
• Fabric Loader Version:
• Fabric API Version:
• Mod Version:2.1.0

Additional context

Add any other context about the problem here.