Modpack Version

2.2.2

Describe your issue.

The modpack launches just fine and I play a server through ApexHosting. Everytime I try to join the world however, it doesn’t let me join and displays a message saying “Internal Exception: io.netty.handler.codec.DecoderException: Invalid Item ‘spectrum:glass_crest_ultra_greatsword’, must be IMaterialItem “
Can someone explain what this means and how to fix it?
I tried deleting the modpack and reinstalling it, as well as doing the same with curseforge. I also reset the entire server and its contents, and restarted my computer as well.

Crash Report

No response

Latest Log

No response

Have you modified the modpack?

Yes

User Modifications

I added 14 mods, and do not have issues within my logs with any of the added mods, and i was having this issue before adding them:

Inventory Profiles Next
Fabric Language Kotlin
libIPN
Inventory HUD+
Terralith
Cut Through
PuzzlesLib
Visual Workbench
Easy Magic
Cluttered
Item Highlighter
Doggy Talents Next
Forge Config Api Port
Goblin Traders

Did the issue happen in singleplayer or on a server?

Server

Discord Username

No response