Just as I said in the title, but here's the error report.

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

Time: 2025-02-13 16:44:54
Description: Initializing game

java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors, provided by 'ambientsounds' at 'team.creative.ambientsounds.AmbientSounds'!
at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$2(FabricLoaderImpl.java:403)
at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:401)
at net.fabricmc.loader.impl.game.minecraft.Hooks.startClient(Hooks.java:53)
at knot//net.minecraft.class_310.(class_310.java:476)
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: java.lang.NullPointerException: Cannot invoke "net.minecraft.class_3304.method_14477(net.minecraft.class_3302)" because "reloadableResourceManager" is null
at knot//team.creative.creativecore.CreativeFabricLoader.registerReloadListener(CreativeFabricLoader.java:61)
at knot//team.creative.ambientsounds.AmbientSounds.onInitializeClient(AmbientSounds.java:67)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:399)
... 6 more

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

-- Head --
Thread: Render thread
Stacktrace:
at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$2(FabricLoaderImpl.java:403)
at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:401)
at net.fabricmc.loader.impl.game.minecraft.Hooks.startClient(Hooks.java:53)
at knot//net.minecraft.class_310.(class_310.java:476)

-- Initialization --
Details:
Modules:
ADVAPI32.dll:Advanced Windows 32 Base API:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
COMCTL32.dll:User Experience Controls Library:6.10 (WinBuild.160101.0800):Microsoft Corporation
CRYPT32.dll:Crypto API32:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
CRYPTBASE.dll:Base cryptographic API DLL:10.0.26100.2894 (WinBuild.160101.0800):Microsoft Corporation
CRYPTSP.dll:Cryptographic Service Provider API:10.0.26100.2454 (WinBuild.160101.0800):Microsoft Corporation
DBGHELP.DLL:Windows Image Helper:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
DNSAPI.dll:DNS Client API DLL:10.0.26100.1591 (WinBuild.160101.0800):Microsoft Corporation
GDI32.dll:GDI Client DLL:10.0.26100.2033 (WinBuild.160101.0800):Microsoft Corporation
IMM32.DLL:Multi-User Windows IMM32 API Client DLL:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
IPHLPAPI.DLL:IP Helper API:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
KERNEL32.DLL:Windows NT BASE API Client DLL:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
KERNELBASE.dll:Windows NT BASE API Client DLL:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
MpOav.dll:IOfficeAntiVirus Module:4.18.24090.11 (26d75470953920f90fd0438874501e9d9a31e621):Microsoft Corporation
NSI.dll:NSI User-mode interface DLL:10.0.26100.2894 (WinBuild.160101.0800):Microsoft Corporation
NTASN1.dll:Microsoft ASN.1 API:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
OLEAUT32.dll:OLEAUT32.DLL:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
Ole32.dll:Microsoft OLE for Windows:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
POWRPROF.dll:Power Profile Helper DLL:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
PSAPI.DLL:Process Status Helper:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
Pdh.dll:Windows Performance Data Helper DLL:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
RPCRT4.dll:Remote Procedure Call Runtime:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
SHCORE.dll:SHCORE:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
SHELL32.dll:Windows Shell Common Dll:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
UMPDC.dll:User Mode Power Dependency Coordinator:10.0.26100.1301 (WinBuild.160101.0800):Microsoft Corporation
USER32.dll:Multi-User Windows USER API Client DLL:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
USERENV.dll:Userenv:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
VCRUNTIME140.dll:Microsoft® C Runtime Library:14.29.30139.0 built by: vcwrkspc:Microsoft Corporation
VERSION.dll:Version Checking and File Installation Libraries:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
WINHTTP.dll:Windows HTTP Services:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
WINMM.dll:MCI API DLL:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
WS2_32.dll:Windows Socket 2.0 32-Bit DLL:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
amsi.dll:Anti-Malware Scan Interface:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
apphelp.dll:Application Compatibility Client Library:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
bcrypt.dll:Windows Cryptographic Primitives Library:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
bcryptPrimitives.dll:Windows Cryptographic Primitives Library:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
clbcatq.dll:COM+ Configuration Catalog:2001.12.10941.16384 (WinBuild.160101.0800):Microsoft Corporation
combase.dll:Microsoft COM for Windows:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
dbgcore.DLL:Windows Core Debugging Helpers:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
dxcore.dll:DXCore:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
extnet.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
fwpuclnt.dll:FWP/IPsec User-Mode API:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
gdi32full.dll:GDI Client DLL:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
glfw.dll:GLFW 3.4.0 DLL:3.4.0:GLFW
java.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
javaw.exe:OpenJDK Platform binary:21.0.3.0:Microsoft
jemalloc.dll
jimage.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
jli.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
jna10120402404841226784.dll:JNA native library:7.0.2:Java(TM) Native Access (JNA)
jsvml.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
jvm.dll:OpenJDK 64-Bit server VM:21.0.3.0:Microsoft
kernel.appcore.dll:AppModel API Host:10.0.26100.1591 (WinBuild.160101.0800):Microsoft Corporation
lwjgl.dll
management.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
management_ext.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
msvcp140.dll:Microsoft® C Runtime Library:14.29.30139.0 built by: vcwrkspc:Microsoft Corporation
msvcp_win.dll:Microsoft® C Runtime Library:10.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
msvcrt.dll:Windows NT CRT DLL:7.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
mswsock.dll:Microsoft Windows Sockets 2.0 Service Provider:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
napinsp.dll:E-mail Naming Shim Provider:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
ncrypt.dll:Windows NCrypt Router:10.0.26100.1591 (WinBuild.160101.0800):Microsoft Corporation
net.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
nio.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
nlansp_c.dll:NLA Namespace Service Provider DLL:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
ntdll.dll:NT Layer DLL:10.0.26100.2454 (WinBuild.160101.0800):Microsoft Corporation
perfos.dll:Windows System Performance Objects DLL:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
pfclient.dll:SysMain Client:10.0.26100.1301 (WinBuild.160101.0800):Microsoft Corporation
profapi.dll:User Profile Basic API:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
rasadhlp.dll:Remote Access AutoDial Helper:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
rsaenh.dll:Microsoft Enhanced Cryptographic Provider:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
sechost.dll:Host for SCM/SDDL/LSA Lookup APIs:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
shlwapi.dll:Shell Light-weight Utility Library:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
sunmscapi.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
ucrtbase.dll:Microsoft® C Runtime Library:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
vcruntime140_1.dll:Microsoft® C Runtime Library:14.29.30139.0 built by: vcwrkspc:Microsoft Corporation
verify.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
win32u.dll:Win32u:10.0.26100.3194 (WinBuild.160101.0800):Microsoft Corporation
windows.storage.dll:Microsoft WinRT Storage API:10.0.26100.1457 (WinBuild.160101.0800):Microsoft Corporation
winrnr.dll:LDAP RnR Provider DLL:10.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
wshbth.dll:Windows Sockets Helper DLL:10.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
wshunix.dll:AF_UNIX Winsock2 Helper DLL:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
zip.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
Stacktrace:
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)

-- System Details --
Details:
Minecraft Version: 1.21.4
Minecraft Version ID: 1.21.4
Operating System: Windows 11 (amd64) version 10.0
Java Version: 21.0.3, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 195356016 bytes (186 MiB) / 450887680 bytes (430 MiB) up to 4294967296 bytes (4096 MiB)
CPUs: 12
Processor Vendor: AuthenticAMD
Processor Name: AMD Ryzen 5 5600H with Radeon Graphics
Identifier: AuthenticAMD Family 25 Model 80 Stepping 0
Microarchitecture: Zen 3
Frequency (GHz): 3.29
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 12
Graphics card #0 name: AMD Radeon(TM) Graphics
Graphics card #0 vendor: Advanced Micro Devices, Inc.
Graphics card #0 VRAM (MiB): 512.00
Graphics card #0 deviceId: VideoController1
Graphics card #0 versionInfo: 31.0.21910.5
Graphics card #1 name: NVIDIA GeForce RTX 3050 Laptop GPU
Graphics card #1 vendor: NVIDIA
Graphics card #1 VRAM (MiB): 4096.00
Graphics card #1 deviceId: VideoController2
Graphics card #1 versionInfo: 32.0.15.6103
Memory slot #0 capacity (MiB): 8192.00
Memory slot #0 clockSpeed (GHz): 3.20
Memory slot #0 type: DDR4
Virtual memory max (MiB): 24936.25
Virtual memory used (MiB): 11217.54
Swap memory total (MiB): 17408.00
Swap memory used (MiB): 930.65
Space in storage for jna.tmpdir (MiB): available: 95683.11, total: 467760.00
Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 95683.11, total: 467760.00
Space in storage for io.netty.native.workdir (MiB): available: 95683.11, total: 467760.00
Space in storage for java.io.tmpdir (MiB): available: 95683.11, total: 467760.00
Space in storage for workdir (MiB): available: 95683.11, total: 467760.00
JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4096m -Xms256m
Fabric Mods:
ambientenvironment: AmbientEnvironment 21.0.0.3
ambientsounds: AmbientSounds 6.1.6
balm-fabric: Balm 21.4.12
kuma_api: KumaAPI 21.4.5
betterfpsdist: Better FPS distance Mod 1.21-6.0
cavedust: Cave Dust 3.0.1
kirin: Kirin UI 1.20.3+1.21.4
clumps: Clumps 22.0.0.1
continuity: Continuity 3.0.0+1.21.4
creativecore: CreativeCore 2.12.33
net_neoforged_bus: bus 7.2.0
cupboard: cupboard 1.21-2.9
entity_model_features: Entity Model Features 2.4.1
entity_texture_features: Entity Texture Features 6.2.10
org_apache_httpcomponents_httpmime: httpmime 4.5.10
entityculling: EntityCulling 1.7.2
fabric-api: Fabric API 0.116.1+1.21.4
fabric-api-base: Fabric API Base 0.4.54+b47eab6b04
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.86+b1caf1e904
fabric-biome-api-v1: Fabric Biome API (v1) 15.0.6+b1c29d8e04
fabric-block-api-v1: Fabric Block API (v1) 1.0.31+7feeb73304
fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.19+7feeb73304
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 2.0.8+7feeb73304
fabric-client-tags-api-v1: Fabric Client Tags 1.1.29+20ea1e2304
fabric-command-api-v1: Fabric Command API (v1) 1.2.62+f71b366f04
fabric-command-api-v2: Fabric Command API (v2) 2.2.41+e496eb1504
fabric-commands-v0: Fabric Commands (v0) 0.2.79+df3654b304
fabric-content-registries-v0: Fabric Content Registries (v0) 9.1.17+7feeb73304
fabric-convention-tags-v1: Fabric Convention Tags 2.1.15+7f945d5b04
fabric-convention-tags-v2: Fabric Convention Tags (v2) 2.12.1+e359e31604
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.3.6+7feeb73304
fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.5.2+2d7e411e04
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 22.2.10+20ea1e2304
fabric-dimensions-v1: Fabric Dimensions API (v1) 4.0.10+7feeb73304
fabric-entity-events-v1: Fabric Entity Events (v1) 2.0.13+1934821104
fabric-events-interaction-v0: Fabric Events Interaction (v0) 4.0.3+a4eebcf004
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.63+7d48d43904
fabric-item-api-v1: Fabric Item API (v1) 11.2.0+42f2d2ba04
fabric-item-group-api-v1: Fabric Item Group API (v1) 4.2.0+fcb9601404
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.57+7d48d43904
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.55+df3654b304
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.5.4+bf2a60eb04
fabric-loot-api-v2: Fabric Loot API (v2) 3.0.36+3f89f5a504
fabric-loot-api-v3: Fabric Loot API (v3) 1.0.24+203e6b2304
fabric-message-api-v1: Fabric Message API (v1) 6.0.25+7feeb73304
fabric-model-loading-api-v1: Fabric Model Loading API (v1) 4.3.0+ae23723504
fabric-networking-api-v1: Fabric Networking API (v1) 4.3.10+8998135104
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 18.0.11+7d48d43904
fabric-particles-v1: Fabric Particles (v1) 4.0.14+7feeb73304
fabric-recipe-api-v1: Fabric Recipe API (v1) 8.0.9+160b66fa04
fabric-registry-sync-v0: Fabric Registry Sync (v0) 6.1.8+742bac2904
fabric-renderer-api-v1: Fabric Renderer API (v1) 5.0.3+50f0feb204
fabric-renderer-indigo: Fabric Renderer - Indigo 2.0.3+50f0feb204
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.57+73761d2e04
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.1.19+7feeb73304
fabric-rendering-v1: Fabric Rendering (v1) 10.2.1+0d31b09f04
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 5.0.13+203e6b2304
fabric-resource-loader-v0: Fabric Resource Loader (v0) 3.0.14+e359e31604
fabric-screen-api-v1: Fabric Screen API (v1) 2.0.38+7feeb73304
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.115+7feeb73304
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.32+7feeb73304
fabric-tag-api-v1: Fabric Tag API (v1) 1.0.5+7d48d43904
fabric-transfer-api-v1: Fabric Transfer API (v1) 5.4.9+efa825c904
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 6.3.2+56e78b9b04
fabricloader: Fabric Loader 0.16.10
mixinextras: MixinExtras 0.4.1
immediatelyfast: ImmediatelyFast 1.3.4+1.21.4
net_lenni0451_reflect: Reflect 1.3.4
iris: Iris 1.8.5+mc1.21.4
io_github_douira_glsl-transformer: glsl-transformer 2.0.1
org_anarres_jcpp: jcpp 1.4.14
org_antlr_antlr4-runtime: antlr4-runtime 4.13.1
java: OpenJDK 64-Bit Server VM 21
lithium: Lithium 0.14.7+mc1.21.4
mc-258859: MC-258859 1.0
minecraft: Minecraft 1.21.4
modernfix: ModernFix 5.20.3+mc1.21.4
modmenu: Mod Menu 13.0.2
mr_better_snowybiome: Better Snowy Biome 1-v0.5
mr_lithosphere: Lithosphere 1.4
naturescompass: Nature's Compass 1.21.4-2.2.8-fabric
noisium: Noisium 2.5.0+mc1.21.4
placeholder-api: Placeholder API 2.5.1+1.21.3
sodium: Sodium 0.6.7+mc1.21.4
sound_physics_remastered: Sound Physics Remastered 1.21.4-1.4.8
terracotta_shingles: Terracotta Shingles 1.1
terrastorage: Terrastorage 1.2.5
com_electronwill_night-config_core: core 3.8.1
com_electronwill_night-config_toml: toml 3.8.1
the_afterdark: The Afterdark 1.0.3.1
waystones: Waystones 21.4.6
wwoo: William Wythers' Overhauled Overworld 2.4.3
xaerominimap: Xaero's Minimap 25.0.1
xaeroworldmap: Xaero's World Map 1.39.3
Launched Version: fabric-loader-0.16.10-1.21.4
Launcher name: minecraft-launcher
Backend library: LWJGL version 3.3.3-snapshot
Backend API: Unknown
Window size:
GFLW Platform:
GL Caps: Using framebuffer using OpenGL 3.2
GL debug messages:
Is Modded: Definitely; Client brand changed to 'fabric'
Universe: 404
Type: Client (map_client.txt)
Locale: en_US
System encoding: Cp1252
File encoding: UTF-8
CPU:

Fixed in the newest version of CreativeCore. Thanks for reporting this issue!