I got a crash log that was labeled as being caused by both Food Funk and Additional Banners: https://pastebin.com/arUb5NXZ

So I disabled Additional Banners, and got a similar log labeled for Food Funk and Quark: https://pastebin.com/QNQvEKc0

Any idea what's happening here?

Try version 4.0.4 which I just pushed. If it isn't on Curseforge yet you can download it from Github releases: https://github.com/Stormwind99/FoodFunk/releases/tag/4.0.4

Actually, try version 4.0.5 - I added another defense there too.

https://github.com/Stormwind99/FoodFunk/releases/tag/4.0.5

Earlier today I found a crash where if an item doesn't have an entry in both rot id and rot days, then a similar crash can occur - so I suggest checking that. I have a fix, but the current code state isn't in a release-able state yet.

Just tried that, still getting the same crash. Although now it's flagging Extra Utilities 2 instead of the others, so...I dunno.