Description
Opening inventory in creative on Forge 1.20.1 crashes the game. This triggers a NullPointerException for Registry Object not present: cccbridge:source_block.

To Reproduce
Steps to reproduce the behavior:

1. Go into creative
2. Open inventory
3. Crash
4. See error

Expected behavior
Opening the inventory in creative does not crash the game

Screenshots
If applicable, add screenshots to help explain your problem here.

Software (please complete the following information):

• Minecraft Version: 1.20.1
• Mod Version: 1.6.3
• ModLoader: Forge

Crashlog
https://mclo.gs/l8rK6RJ

Hello!

May I ask for the full log?
Have you also tested this in an isolated environment? Because I can't reproduce this issue.

I got the full logs through my DMs.
Turns out the used custom modpack here was causing this issue, because some mods were missing on server side.