I have been told it might be caused by Accessories

Server log: https://mclo.gs/HkKI1q8

Version: accessories-fabric-1.2.15-beta+1.21.4

Thanks for any help/info

Closing this issue as required resolving from Enchancementwhich sounds like they have a fix already coming soon. Will look at within the future adjusting the mixin to prevent mods causing issues even though it shouldn't be a issue.

Alright, thanks for everything

I believe due to this line of code where they are doing something that will cause issues as it changes the RegistryEntry.Reference to an invalid state leading to issues when mods rely on the fact that all enchantments should be within the registry.

At best remove Enhancement mod until they fix this issue