Originally from xJon/The-1.12.2-Pack#962:

https://github.com/user-attachments/files/15912267/crash-2024-06-20_11.07.56-server.txt
https://github.com/user-attachments/files/15912268/crash-2024-06-20_11.09.08-server.txt

Based on the crash log, i tested on my test pack adding only Charset crafting and Charsetlib, and the issue is created, I disabled the crafting.cauldron module in the charset config and the issue is resolved

• More specifically, the issue is to do with the I:waterBottleSize= config in crafting.cauldrons cfg file, the mod changes it to 250 by default which screws with witchery's potion making it seems, i set the config to I:waterBottleSize=0 (to make it default) and i could make the potion with the module enabled

Disabling the Charset feature appears to be a valid workaround, so it can be recommended if resolving this through 🚾 proves time consuming.