Hey, i had added the issue on the Travelers Backpack side.

i think it is only an rework from some namespaces, to fix this

Tiviacz1337/Travelers-Backpack#1095

0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)

Fabric 1.21.1 on 0.16.9
Minecraft 1.21.1
You're in Grave Danger 2.4.11
[1.21.1] Traveler's Backpack 10.1.4

An a lot of more

1. Describe the bug

Crash on Server Startup with YIGD

[22:16:41 ERROR] [main]: [Main] Failed to start the minecraft server
java.lang.RuntimeException: Could not execute entrypoint stage 'main' due to errors, provided by 'yigd' at 'com.b1n_ry.yigd.Yigd'!
        at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$2(FabricLoaderImpl.java:403) ~[fabric-loader-0.16.9.jar:?]
        at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33) ~[fabric-loader-0.16.9.jar:?]
        at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:401) ~[fabric-loader-0.16.9.jar:?]
        at net.fabricmc.loader.impl.game.minecraft.Hooks.startServer(Hooks.java:63) ~[fabric-loader-0.16.9.jar:?]
        at knot/net.minecraft.server.Main.main(Main.java:111) [server-intermediary.jar:?]
        at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480) [fabric-loader-0.16.9.jar:?]
        at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) [fabric-loader-0.16.9.jar:?]
        at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) [fabric-loader-0.16.9.jar:?]
        at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) [fabric-loader-0.16.9.jar:?]
        at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69) [fabric-server-mc.1.21.1-loader.0.16.9-launcher.1.0.1.jar:1.0.1]
Caused by: java.lang.NoSuchFieldError: Class com.tiviacz.travelersbackpack.config.TravelersBackpackConfigData$BackpackSettings does not have member field 'boolean accessoriesIntegration'
        at knot/com.b1n_ry.yigd.compat.TravelersBackpackCompat.isAccessoriesIntegrationEnabled(TravelersBackpackCompat.java:22) ~[youre-in-grave-danger-fabric-2.4.11.jar:?]
        at knot/com.b1n_ry.yigd.compat.InvModCompat.reloadModCompat(InvModCompat.java:31) ~[youre-in-grave-danger-fabric-2.4.11.jar:?]
        at knot/com.b1n_ry.yigd.Yigd.onInitialize(Yigd.java:83) ~[youre-in-grave-danger-fabric-2.4.11.jar:?]
        at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:399) ~[fabric-loader-0.16.9.jar:?]
        ... 7 more

2. Write steps to reproduce the bug

Add newest update 10.1.4

3. What is expected behaviour

Server starts without issues.

4. Screenshots (If applicable)

Hello, Backpack component has been reworked and is no longer used if trinkets/accessories integration is enabled. You can Remove checks for this config option. Also backpack custom drop is supressed if trinkets/accessories enabled, so it drops by default from trinkets/accessories inventory.

I'd suggest for you to just check if TravelersBackpack#enableIntegration && ComponentUtils#isWearingBackpack and execute grave code if it returns true - it means trinkets/accessories not installed (or installed but config option disabled) and player is wearing backpack

I did start the server without the yigd, stop, add it back, and start again, that solved my problem. Also doing what Tiviac said, dissabling enableTravelersBackpackCompat and enableTrinketsCompat is enough for it to work without crashing.

I did start the server without the yigd, stop, add it back, and start again, that solved my problem. Also doing what Tiviac said, dissabling enableTravelersBackpackCompat and enableTrinketsCompat is enough for it to work without crashing.

Yeah, this is a workaround, but fix not an crash

@B1n-ry you could look here for the right mappings -> https://github.com/Skidamek/AutoModpack

Skidamek has the gradle always up to date

I'm pretty confident that my mappings and gradle are up to date, however with the latest 2 fabric versions of travelers backpack, when trying to use them in my development environment, either loom will fail to remap from mojmap to yarn, or I will get "unfixable exception", which if I understand it correctly comes from mappings overlapping or something.
I have to admit gradle is not my strong suit though, so I'm probably doing something wrong

Ah okey, sorry, thats not my intention, had thougt i could help, if loom or some things are not getting right.

I use parchment mappings on fabric too if it changes something

Sorry I realized I never replied here. A new update with a fix should be released in just a few days for neoforge. I can't seem to get 10.1.4 loaded in my development environment on fabric with the correct mappings for some reason though, so that might prove harder to fix. I'll try though

Alright I remapped to mojmap, and then I was allowed to fix it.
Fixed as of YiGD 2.4.12 for fabric, or 2.0.8 for neoforge (1.21)