Heya - Here is details etc:

---- Minecraft Crash Report ----
// My bad.

Time: 2023-02-07 19:53:18
Description: Initializing game

java.lang.RuntimeException: Could not execute entrypoint stage 'main' due to errors, provided by 'simple_backpack'!
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.lambda$invoke0$0(EntrypointUtils.java:51)
at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:49)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke(EntrypointUtils.java:35)
at net.fabricmc.loader.impl.game.minecraft.Hooks.startClient(Hooks.java:52)
at net.minecraft.class_310.(class_310.java:459)
at net.minecraft.client.main.Main.method_44604(Main.java:205)
at net.minecraft.client.main.Main.main(Main.java:51)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:461)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/class_7922
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:467)
at net.fabricmc.loader.impl.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50)
at net.fabricmc.loader.impl.entrypoint.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:117)
at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:47)
... 8 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.class_7922
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:226)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:112)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
... 14 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.entrypoint.EntrypointUtils.lambda$invoke0$0(EntrypointUtils.java:51)
at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:49)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke(EntrypointUtils.java:35)
at net.fabricmc.loader.impl.game.minecraft.Hooks.startClient(Hooks.java:52)
at net.minecraft.class_310.(class_310.java:459)

-- Initialization --
Details:
Modules:
ADVAPI32.dll:Advanced Windows 32 Base API:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
COMCTL32.dll:User Experience Controls Library:6.10 (WinBuild.160101.0800):Microsoft Corporation
CRYPT32.dll:Crypto API32:10.0.22621.1265 (WinBuild.160101.0800):Microsoft Corporation
CRYPTBASE.dll:Base cryptographic API DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
CRYPTSP.dll:Cryptographic Service Provider API:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
DBGHELP.DLL:Windows Image Helper:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
DNSAPI.dll:DNS Client API DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
GDI32.dll:GDI Client DLL:10.0.22621.608 (WinBuild.160101.0800):Microsoft Corporation
IMM32.DLL:Multi-User Windows IMM32 API Client DLL:10.0.22621.755 (WinBuild.160101.0800):Microsoft Corporation
IPHLPAPI.DLL:IP Helper API:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
KERNEL32.DLL:Windows NT BASE API Client DLL:10.0.22621.900 (WinBuild.160101.0800):Microsoft Corporation
KERNELBASE.dll:Windows NT BASE API Client DLL:10.0.22621.900 (WinBuild.160101.0800):Microsoft Corporation
MpOav.dll:IOfficeAntiVirus Module:4.18.2211.5 (WinBuild.160101.0800):Microsoft Corporation
NSI.dll:NSI User-mode interface DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
NTASN1.dll:Microsoft ASN.1 API:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
OLEAUT32.dll:OLEAUT32.DLL:10.0.22621.608 (WinBuild.160101.0800):Microsoft Corporation
Ole32.dll:Microsoft OLE for Windows:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
PSAPI.DLL:Process Status Helper:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
Pdh.dll:Windows Performance Data Helper DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
RPCRT4.dll:Remote Procedure Call Runtime:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
SHCORE.dll:SHCORE:10.0.22621.1265 (WinBuild.160101.0800):Microsoft Corporation
SHELL32.dll:Windows Shell Common Dll:10.0.22621.1265 (WinBuild.160101.0800):Microsoft Corporation
USER32.dll:Multi-User Windows USER API Client DLL:10.0.22621.1265 (WinBuild.160101.0800):Microsoft Corporation
USERENV.dll:Userenv:10.0.22621.1 (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:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
WINHTTP.dll:Windows HTTP Services:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
WINMM.dll:MCI API DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
WS2_32.dll:Windows Socket 2.0 32-Bit DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
WSOCK32.dll:Windows Socket 32-Bit DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
amsi.dll:Anti-Malware Scan Interface:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
bcrypt.dll:Windows Cryptographic Primitives Library:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
bcryptPrimitives.dll:Windows Cryptographic Primitives Library:10.0.22621.1 (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:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
dbgcore.DLL:Windows Core Debugging Helpers:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
dhcpcsvc.DLL:DHCP Client Service:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
dhcpcsvc6.DLL:DHCPv6 Client:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
fwpuclnt.dll:FWP/IPsec User-Mode API:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
gdi32full.dll:GDI Client DLL:10.0.22621.963 (WinBuild.160101.0800):Microsoft Corporation
java.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
javaw.exe:OpenJDK Platform binary:17.0.3.0:Microsoft
jemalloc.dll
jimage.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
jli.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
jna7651453130589415623.dll:JNA native library:6.1.2:Java(TM) Native Access (JNA)
jsvml.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
jvm.dll:OpenJDK 64-Bit server VM:17.0.3.0:Microsoft
kernel.appcore.dll:AppModel API Host:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
lwjgl.dll
management.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
management_ext.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
msvcp140.dll:Microsoft® C Runtime Library:14.29.30139.0 built by: vcwrkspc:Microsoft Corporation
msvcp_win.dll:Microsoft® C Runtime Library:10.0.22621.608 (WinBuild.160101.0800):Microsoft Corporation
msvcrt.dll:Windows NT CRT DLL:7.0.22621.608 (WinBuild.160101.0800):Microsoft Corporation
mswsock.dll:Microsoft Windows Sockets 2.0 Service Provider:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
napinsp.dll:E-mail Naming Shim Provider:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
ncrypt.dll:Windows NCrypt Router:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
net.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
nio.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
nlansp_c.dll:NLA Namespace Service Provider DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
ntdll.dll:NT Layer DLL:10.0.22621.900 (WinBuild.160101.0800):Microsoft Corporation
perfos.dll:Windows System Performance Objects DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
pfclient.dll:SysMain Client:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
pnrpnsp.dll:PNRP Name Space Provider:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
profapi.dll:User Profile Basic API:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
rasadhlp.dll:Remote Access AutoDial Helper:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
rsaenh.dll:Microsoft Enhanced Cryptographic Provider:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
sechost.dll:Host for SCM/SDDL/LSA Lookup APIs:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
shlwapi.dll:Shell Light-weight Utility Library:10.0.22621.1265 (WinBuild.160101.0800):Microsoft Corporation
sunmscapi.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
ucrtbase.dll:Microsoft® C Runtime Library:10.0.22621.608 (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:17.0.3.0:Microsoft
win32u.dll:Win32u:10.0.22621.963 (WinBuild.160101.0800):Microsoft Corporation
windows.storage.dll:Microsoft WinRT Storage API:10.0.22621.1265 (WinBuild.160101.0800):Microsoft Corporation
winrnr.dll:LDAP RnR Provider DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
wintypes.dll:Windows Base Types DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
wshbth.dll:Windows Sockets Helper DLL:10.0.22621.1 (WinBuild.160101.0800):Microsoft Corporation
zip.dll:OpenJDK Platform binary:17.0.3.0:Microsoft
Stacktrace:
at net.minecraft.client.main.Main.method_44604(Main.java:205)
at net.minecraft.client.main.Main.main(Main.java:51)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:461)
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: 1.19.2
Minecraft Version ID: 1.19.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 17.0.3, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 1202953192 bytes (1147 MiB) / 1610612736 bytes (1536 MiB) up to 2147483648 bytes (2048 MiB)
CPUs: 8
Processor Vendor: GenuineIntel
Processor Name: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
Identifier: Intel64 Family 6 Model 142 Stepping 12
Microarchitecture: whiskey Lake
Frequency (GHz): 2.30
Number of physical packages: 1
Number of physical CPUs: 4
Number of logical CPUs: 8
Graphics card #0 name: Intel(R) UHD Graphics
Graphics card #0 vendor: Intel Corporation (0x8086)
Graphics card #0 VRAM (MB): 1024.00
Graphics card #0 deviceId: 0x9b41
Graphics card #0 versionInfo: DriverVersion=30.0.101.1404
Memory slot #0 capacity (MB): 16384.00
Memory slot #0 clockSpeed (GHz): 3.20
Memory slot #0 type: DDR4
Virtual memory max (MB): 36496.19
Virtual memory used (MB): 32311.43
Swap memory total (MB): 20274.65
Swap memory used (MB): 2958.82
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
cloth-config: Cloth Config v6 6.4.90
cloth-basic-math: cloth-basic-math 0.6.1
create: Create 0.5.0g-796+1.19.2
com_google_code_findbugs_jsr305: jsr305 3.0.2
fake-player-api: Fake Player API 0.5.0
flywheel: Flywheel 0.6.8-1
forgeconfigapiport: Forge Config API Port 4.2.6
com_electronwill_night-config_core: core 3.6.5
com_electronwill_night-config_toml: toml 3.6.5
milk: Milk Lib 1.0.51
dripstone_fluid_lib: Dripstone Fluid Lib 2.0.1
noindium: No Indium? 1.1.0+1.19
porting_lib: Porting Lib 2.1.623+1.19.2
forge_tags: Porting Lib Tags 3.0
porting_lib_base: Porting Lib Base 2.1.623+1.19.2
com_github_llamalad7_mixinextras: MixinExtras 0.1.1
mm: Manningham Mills 2.3
serialization_hooks: Serialization Hooks 0.3.26
porting_lib_entity: Porting Lib Entity 2.1.623+1.19.2
porting_lib_lazy_registration: Porting Lib Lazy Register 2.1.623+1.19.2
porting_lib_model_generators: Porting Lib Model Generators 2.1.623+1.19.2
porting_lib_models: Porting Lib Models 2.1.623+1.19.2
porting_lib_networking: Porting Lib Networking 2.1.623+1.19.2
porting_lib_obj_loader: Porting Lib Obj Loader 2.1.623+1.19.2
porting_lib_model_loader: Porting Lib Model Loader 2.1.623+1.19.2
porting_lib_transfer: Porting Lib Transfer 2.1.623+1.19.2
porting_lib_extensions: Porting Lib Extensions 2.1.623+1.19.2
porting_lib_accessors: Porting Lib Accessors 2.1.623+1.19.2
porting_lib_attributes: Porting Lib Attributes 2.1.623+1.19.2
porting_lib_constants: Porting Lib Constants 2.1.623+1.19.2
porting_lib_common: Porting Lib Common 2.1.623+1.19.2
reach-entity-attributes: Reach Entity Attributes 2.3.0
registrate-fabric: Registrate for Fabric 1.1.44-MC1.19.2
fabric-api: Fabric API 0.73.0+1.19.2
fabric-api-base: Fabric API Base 0.4.14+6e0787e690
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.13+93d8cb8290
fabric-biome-api-v1: Fabric Biome API (v1) 9.1.0+82db024a90
fabric-block-api-v1: Fabric Block API (v1) 1.0.2+e415d50e90
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.23+c6af733c90
fabric-client-tags-api-v1: Fabric Client Tags 1.0.4+b35fea8390
fabric-command-api-v1: Fabric Command API (v1) 1.2.15+f71b366f90
fabric-command-api-v2: Fabric Command API (v2) 2.2.0+413cbbc790
fabric-commands-v0: Fabric Commands (v0) 0.2.32+df3654b390
fabric-containers-v0: Fabric Containers (v0) 0.1.40+df3654b390
fabric-content-registries-v0: Fabric Content Registries (v0) 3.5.0+7c6cd14d90
fabric-convention-tags-v1: Fabric Convention Tags 1.2.1+27265b3490
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.2.8+aeb40ebe90
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 5.3.6+413cbbc790
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.1.34+0d0f210290
fabric-entity-events-v1: Fabric Entity Events (v1) 1.5.3+9244241690
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.33+562bff6e90
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.34+df3654b390
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.24+b6b6abb490
fabric-item-api-v1: Fabric Item API (v1) 1.6.4+693ffc0590
fabric-item-groups-v0: Fabric Item Groups (v0) 0.3.37+9244241690
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.25+5c4fce2890
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.23+df3654b390
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.2.3+1b46dc7890
fabric-loot-api-v2: Fabric Loot API (v2) 1.1.11+83a8659290
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.1.14+9e7660c690
fabric-message-api-v1: Fabric Message API (v1) 5.0.6+93d8cb8290
fabric-mining-level-api-v1: Fabric Mining Level API (v1) 2.1.22+33fbc73890
fabric-models-v0: Fabric Models (v0) 0.3.20+c6af733c90
fabric-networking-api-v1: Fabric Networking API (v1) 1.2.10+10eb22f490
fabric-networking-v0: Fabric Networking (v0) 0.3.27+df3654b390
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 4.2.0+d8ef690890
fabric-particles-v1: Fabric Particles (v1) 1.0.13+4d0d570390
fabric-recipe-api-v1: Fabric Recipe API (v1) 1.0.0+413cbbc790
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.9.31+9244241690
fabric-renderer-api-v1: Fabric Renderer API (v1) 1.2.0+2e5408b590
fabric-renderer-indigo: Fabric Renderer - Indigo 0.7.0+2e5408b590
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.23+df3654b390
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.18+6e0787e690
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.0.10+4d0d570390
fabric-rendering-v0: Fabric Rendering (v0) 1.1.26+df3654b390
fabric-rendering-v1: Fabric Rendering (v1) 1.12.0+d8ef690890
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 2.1.2+aae9039d90
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.8.3+251d254a90
fabric-screen-api-v1: Fabric Screen API (v1) 1.0.31+4d0d570390
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.6+1cc24b1b90
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.2+c4f28df590
fabric-textures-v0: Fabric Textures (v0) 1.0.23+aeb40ebe90
fabric-transfer-api-v1: Fabric Transfer API (v1) 2.1.5+413cbbc790
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 1.3.3+08b73de490
fabricloader: Fabric Loader 0.14.13
inventoryhud: Inventory HUD + 3.4.2
java: OpenJDK 64-Bit Server VM 17
jei: Just Enough Items 11.5.2.1007
minecraft: Minecraft 1.19.2
modmenu: Mod Menu 4.0.6
simple_backpack: SimpleBackpack 1.4.7
Flywheel Backend: Uninitialized
Launched Version: fabric-loader-0.14.13-1.19.2
Backend library: LWJGL version 3.3.1 SNAPSHOT
Backend API: Unknown
Window size:
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)
CPU:

Same