Minecraft 1.20.1
Forge 47.3.10
Translocators 2.6.9.86
Crash was by a user of my modpack. Crash occured when player tried to open an existing world. Was able to load a backup and join world with no issue. Also posted on TheCBProject/CBMultipart#176
Crashlog: https://pastebin.com/XezxcgQE
Thanks!