foodfunk is a mod that will made food spoils over time.
After placing some food in the cauldron, the game crash, i guess it check for inventory/crafting slots to update.

i have sent the bug report to you cause it gives no problem with any other mods at the moment, if it's something totally independent by you, tell me and i will sent it to foodfunk also

crash log: log

edit: after a bit more testing it looks like the crash happen when hovering on foodfunk modified item that are place in the cauldron slots