hi, can your check pyhardmode module?
i have error with message '15.199 Error ModManager.cpp:1625: Error while running setup for recipe prototype "rf-sweater" (recipe): Recipe item-product "macguffin" is not stackable but has a max count of 5.'

Hm, well that's pretty annoying. The item "macguffin" is flagged as "not stackable", but the recipe takes an input of 5 macguffins. When attempting to reverse the recipe, it attempts to set the output as 5, which can't be done since the stack limit is 1. I could either make all recipes with "not stackable" ingredients on the no-recycle list, or set the recycle output to 1. I'm not sure how important this item is... but the simplest option is to just make that specific item non-recyclable.

Which is what I ended up doing; should be fixed as of v8.1.19

tnx