Here is the crash report:

Minecraft version: 1.20.2
Apugli version: 2.9.2

Additional notes: Happens directly after joining a server. After the "Joining world..." prompt, it is followed by "Saving world..." and a the following crash. Also mentions the mod "Carpet" (I think?)

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 2024-03-15 23:54:31
Description: Unexpected error

java.lang.NullPointerException: Cannot invoke "net.minecraft.class_640.method_52810()" because "this.field_3901" is null
at net.minecraft.class_742.handler$zeg000$apugli$setPlayerToSkin(class_742.java:527)
at net.minecraft.class_742.method_3123(class_742.java:51)
at net.minecraft.class_742.method_7325(class_742.java:38)
at net.minecraft.class_761.redirect$bhl000$carpet$canSeeWorld(class_761.java:5614)
at net.minecraft.class_761.method_22710(class_761.java:1015)
at net.minecraft.class_757.method_3188(class_757.java:1113)
at net.minecraft.class_757.method_3192(class_757.java:881)
at net.minecraft.class_310.method_1523(class_310.java:1275)
at net.minecraft.class_310.method_1514(class_310.java:856)
at net.minecraft.client.main.Main.main(Main.java:253)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:243)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:278)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)

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

-- Head --
Thread: Render thread
Stacktrace:
at net.minecraft.class_742.handler$zeg000$apugli$setPlayerToSkin(class_742.java:527)
at net.minecraft.class_742.method_3123(class_742.java:51)
at net.minecraft.class_742.method_7325(class_742.java:38)
at net.minecraft.class_761.redirect$bhl000$carpet$canSeeWorld(class_761.java:5614)
at net.minecraft.class_761.method_22710(class_761.java:1015)
at net.minecraft.class_757.method_3188(class_757.java:1113)

-- Affected level --
Details:
All players: 1 total; [class_746['XaNo11'/169571, l='ClientLevel', x=8.50, y=65.00, z=8.50]]
Chunk stats: 4096, 0
Level dimension: manhunt:courier
Level spawn location: World: (8,64,8), Section: (at 8,0,8 in 0,4,0; 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: 0 game time, 0 day time
Server brand: fabric
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.class_638.method_8538(class_638.java:451)
at net.minecraft.class_310.method_1587(class_310.java:2481)
at net.minecraft.class_310.method_1514(class_310.java:880)
at net.minecraft.client.main.Main.main(Main.java:253)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:243)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:278)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)

-- Last reload --
Details:
Reload number: 1
Reload reason: initial
Finished: Yes
Packs: vanilla, fabric, file/manhunt.zip

-- System Details --
Details:
Minecraft Version: 1.20.2
Minecraft Version ID: 1.20.2
Operating System: Windows 11 (amd64) version 10.0
Java Version: 20, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode, sharing), Oracle Corporation
Memory: 11595409920 bytes (11058 MiB) / 12582912000 bytes (12000 MiB) up to 16777216000 bytes (16000 MiB)
CPUs: 16
Processor Vendor: AuthenticAMD
Processor Name: AMD Ryzen 7 3700X 8-Core Processor
Identifier: AuthenticAMD Family 23 Model 113 Stepping 0
Microarchitecture: Zen 2
Frequency (GHz): 3.60
Number of physical packages: 1
Number of physical CPUs: 8
Number of logical CPUs: 16
Graphics card #0 name: NVIDIA GeForce RTX 4070 Ti
Graphics card #0 vendor: NVIDIA (0x10de)
Graphics card #0 VRAM (MB): 4095.00
Graphics card #0 deviceId: 0x2782
Graphics card #0 versionInfo: DriverVersion=31.0.15.4592
Memory slot #0 capacity (MB): 16384.00
Memory slot #0 clockSpeed (GHz): 3.20
Memory slot #0 type: DDR4
Memory slot #1 capacity (MB): 16384.00
Memory slot #1 clockSpeed (GHz): 3.20
Memory slot #1 type: DDR4
Virtual memory max (MB): 51998.34
Virtual memory used (MB): 30863.96
Swap memory total (MB): 19317.00
Swap memory used (MB): 175.61
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms12000m -Xmx16000m
Fabric Mods:
apugli: Apugli 2.9.2
midnightlib: MidnightLib 1.5.0
betterf3: BetterF3 8.0.2
betterpingdisplay: Better Ping Display 1.1.1
c2me: Concurrent Chunk Management Engine 0.2.0+alpha.11.23
c2me-base: Concurrent Chunk Management Engine (Base) 0.2.0+alpha.11.23
c2me-client-uncapvd: Concurrent Chunk Management Engine (Client/Uncap View Distance) 0.2.0+alpha.11.23
c2me-fixes-chunkio-threading-issues: Concurrent Chunk Management Engine (Fixes/Chunk IO/Threading Issues) 0.2.0+alpha.11.23
c2me-fixes-general-threading-issues: Concurrent Chunk Management Engine (Fixes/General/Threading Issues) 0.2.0+alpha.11.23
c2me-fixes-worldgen-threading-issues: Concurrent Chunk Management Engine (Fixes/WorldGen/Threading Issues) 0.2.0+alpha.11.23
c2me-fixes-worldgen-vanilla-bugs: Concurrent Chunk Management Engine (Fixes/WorldGen/Vanilla Bugs) 0.2.0+alpha.11.23
c2me-notickvd: Concurrent Chunk Management Engine (No Tick View Distance) 0.2.0+alpha.11.23
c2me-opts-allocs: Concurrent Chunk Management Engine (Optimizations/Memory Allocations) 0.2.0+alpha.11.23
c2me-opts-chunk-access: Concurrent Chunk Management Engine (Optimizations/Chunk Access) 0.2.0+alpha.11.23
c2me-opts-chunkio: Concurrent Chunk Management Engine (Optimizations/Chunk IO) 0.2.0+alpha.11.23
c2me-opts-math: Concurrent Chunk Management Engine (Optimizations/Math) 0.2.0+alpha.11.23
c2me-opts-scheduling: Concurrent Chunk Management Engine (Optimizations/Scheduling) 0.2.0+alpha.11.23
c2me-opts-worldgen-general: Concurrent Chunk Management Engine (Optimizations/General WorldGen) 0.2.0+alpha.11.23
c2me-opts-worldgen-vanilla: Concurrent Chunk Management Engine (Optimizations/Vanilla WorldGen) 0.2.0+alpha.11.23
c2me-rewrites-chunk-serializer: Concurrent Chunk Management Engine (Rewrites/Chunk Serializer) 0.2.0+alpha.11.23
c2me-rewrites-chunkio: Concurrent Chunk Management Engine (Rewrites/Chunk IO) 0.2.0+alpha.11.23
c2me-server-utils: Concurrent Chunk Management Engine (Server Utils) 0.2.0+alpha.11.23
c2me-threading-chunkio: Concurrent Chunk Management Engine (Threading/WorldGen) 0.2.0+alpha.11.23
c2me-threading-lighting: Concurrent Chunk Management Engine (Threading/Lighting) 0.2.0+alpha.11.23
c2me-threading-worldgen: Concurrent Chunk Management Engine (Threading/WorldGen) 0.2.0+alpha.11.23
com_electronwill_night-config_core: core 3.6.5
com_electronwill_night-config_toml: toml 3.6.5
com_ibm_async_asyncutil: asyncutil 0.1.0
net_objecthunter_exp4j: exp4j 0.4.8
org_threadly_threadly: threadly 7.0
carpet: Carpet Mod 1.4.119+v230928
chat_heads: Chat Heads 0.10.31
citresewn: CIT Resewn JSONLagPatch 1.1.3.2+1.20
citresewn-defaults: CIT Resewn: Defaults 1.1.3.2+1.20
cloth-config: Cloth Config v12 12.0.119
cloth-basic-math: cloth-basic-math 0.6.1
clumps: Clumps 13.0.0.6
connectivity: Connectivity Mod 1.20.2-4.5
cupboard: cupboard 1.20.2-2.1
eggolib: eggolib 1.10.1
breathinglib: Breathing Library 1.0.4
enhancedblockentities: Enhanced Block Entities 0.9.1+1.20.2
advanced_runtime_resource_pack: Runtime Resource Pack 0.8.0
spruceui: SpruceUI 5.0.3+1.20.2
entity_model_features: Entity Model Features 1.2.3
entity_texture_features: Entity Texture Features 5.2.3
org_apache_httpcomponents_httpmime: httpmime 4.5.10
fabric-api: Fabric API 0.91.6+1.20.2
fabric-api-base: Fabric API Base 0.4.33+fce67b32a0
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.43+b1792f7da0
fabric-biome-api-v1: Fabric Biome API (v1) 13.0.14+b1792f7da0
fabric-block-api-v1: Fabric Block API (v1) 1.0.12+73761d2ea0
fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.1+73761d2ea0
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.43+f4b7e424a0
fabric-client-tags-api-v1: Fabric Client Tags 1.1.4+86b12645a0
fabric-command-api-v1: Fabric Command API (v1) 1.2.37+f71b366fa0
fabric-command-api-v2: Fabric Command API (v2) 2.2.16+b1792f7da0
fabric-commands-v0: Fabric Commands (v0) 0.2.54+df3654b3a0
fabric-containers-v0: Fabric Containers (v0) 0.1.81+df3654b3a0
fabric-content-registries-v0: Fabric Content Registries (v0) 5.0.6+b1792f7da0
fabric-convention-tags-v1: Fabric Convention Tags 1.5.8+b1792f7da0
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.2.20+f4b7e424a0
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 13.1.11+b1792f7da0
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.1.57+b1792f7da0
fabric-entity-events-v1: Fabric Entity Events (v1) 1.5.26+b1792f7da0
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.6.10+b1792f7da0
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.70+df3654b3a0
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.42+a44e16a6a0
fabric-item-api-v1: Fabric Item API (v1) 2.1.33+b1792f7da0
fabric-item-group-api-v1: Fabric Item Group API (v1) 4.0.15+e3d2bf3fa0
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.38+f4b7e424a0
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.36+df3654b3a0
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.2.28+c8b10480a0
fabric-loot-api-v2: Fabric Loot API (v2) 2.1.1+3ba460fba0
fabric-message-api-v1: Fabric Message API (v1) 6.0.2+e3d2bf3fa0
fabric-mining-level-api-v1: Fabric Mining Level API (v1) 2.1.56+f4b7e424a0
fabric-model-loading-api-v1: Fabric Model Loading API (v1) 1.0.6+b1792f7da0
fabric-models-v0: Fabric Models (v0) 0.4.5+9386d8a7a0
fabric-networking-api-v1: Fabric Networking API (v1) 3.1.5+f4be560ba0
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 12.1.2+2ff98d3ba0
fabric-particles-v1: Fabric Particles (v1) 1.1.4+f4b7e424a0
fabric-recipe-api-v1: Fabric Recipe API (v1) 2.0.14+52b3ebe5a0
fabric-registry-sync-v0: Fabric Registry Sync (v0) 4.0.12+b1792f7da0
fabric-renderer-api-v1: Fabric Renderer API (v1) 3.2.1+2034447ca0
fabric-renderer-indigo: Fabric Renderer - Indigo 1.5.1+2034447ca0
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.49+df3654b3a0
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.39+73761d2ea0
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.0.30+f4b7e424a0
fabric-rendering-v0: Fabric Rendering (v0) 1.1.52+df3654b3a0
fabric-rendering-v1: Fabric Rendering (v1) 3.0.11+b1792f7da0
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 2.3.11+239dafd8a0
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.11.12+b1792f7da0
fabric-screen-api-v1: Fabric Screen API (v1) 2.0.12+b1792f7da0
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.47+b1792f7da0
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.14+f4b7e424a0
fabric-transfer-api-v1: Fabric Transfer API (v1) 3.3.13+4944b5a5a0
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 5.0.3+fce67b32a0
fabricloader: Fabric Loader 0.15.6
mixinextras: MixinExtras 0.3.2
ferritecore: FerriteCore 6.0.0
indium: Indium 1.0.27+mc1.20.1
iris: Iris 1.6.10
io_github_douira_glsl-transformer: glsl-transformer 2.0.0-pre13
org_anarres_jcpp: jcpp 1.4.14
org_antlr_antlr4-runtime: antlr4-runtime 4.11.1
java: Java HotSpot(TM) 64-Bit Server VM 20
krypton: Krypton 0.2.6
com_velocitypowered_velocity-native: velocity-native 3.2.0-SNAPSHOT
lazydfu: LazyDFU 0.1.3
lithium: Lithium 0.12.0
logical_zoom: Logical Zoom 0.0.21
memoryleakfix: Memory Leak Fix 1.1.5
minecraft: Minecraft 1.20.2
moborigins: Mob Origins 1.11.2
nvidium: Nvidium 0.2.3-beta
origins: Origins 1.12.4
apoli: Apoli 2.11.5
additionalentityattributes: Additional Entity Attributes 1.5.0+1.20.2
calio: Calio 1.13.0
org_quiltmc_parsers_gson: gson 0.2.1
org_quiltmc_parsers_json: json 0.2.1
cardinal-components-base: Cardinal Components API (base) 5.3.0
cardinal-components-entity: Cardinal Components API (entities) 5.3.0
playerabilitylib: Pal 1.9.0
reach-entity-attributes: Reach Entity Attributes 2.4.0
pehkui: Pehkui 3.7.12+1.14.4-1.20.4
kanos_config: Kanos Config 0.4.1+1.14.4-1.19.4
reeses-sodium-options: Reese's Sodium Options 1.7.0+mc1.20.2-build.97
skinlayers3d: 3d-Skin-Layers 1.6.2
sodium: Sodium 0.5.3
sodium-extra: Sodium Extra 0.5.3+mc1.20.2-build.114
caffeineconfig: CaffeineConfig 1.3.0+1.17
crowdin-translate: CrowdinTranslate 1.4+1.19.3
Loaded Shaderpack: (off)
NEC status: No NEC detected
JVM uptime in seconds: 62.12
Launched Version: 1.20.2
Backend library: LWJGL version 3.3.2-snapshot
Backend API: NVIDIA GeForce RTX 4070 Ti/PCIe/SSE2 GL version 3.2.0 NVIDIA 545.92, NVIDIA Corporation
Window size: 1920x1080
GL Caps: Using framebuffer using OpenGL 3.2
GL debug messages:
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Graphics mode: fancy
Resource Packs: vanilla, fabric, file/manhunt.zip
Current Language: en_us
Locale: en_US
CPU: 16x AMD Ryzen 7 3700X 8-Core Processor

This was fixed in 2.10.0. Please update to 2.10.1.