Fabric serverside crashing

[toffee1111]

https://mclo.gs/x4rSIwz

We have tested the exact same modpack and it seems to work just fine, it hasn't crashed and we even played for a while, but when trying to host a server with it (- the clientside mods) it crashes and I can't really figure out why, we've tried a few things but to no avail.

I tried removing a few mods mentioned in the warnings, but these 3 stayed and I have no idea what they mean, I'm convinced they're the problem:

[14:34:54] [main/WARN]: Error loading class: fr/catcore/server/translations/api/resource/language/SystemDelegatedLanguage (java.lang.ClassNotFoundException: fr/catcore/server/translations/api/resource/language/SystemDelegatedLanguage)

[14:34:54] [main/WARN]: Error loading class: net/minecraft/class_5616 (java.lang.ClassNotFoundException: net/minecraft/class_5616)

[14:34:54] [main/WARN]: u/Mixin target net.minecraft.class_5616 was not found registrate-fabric.mixins.json:accessor.BlockEntityRenderersAccessor from mod registrate-fabric

Thanks in advance, sorry if this is a dumb question.