I don't know what mod exactly causes it as I have quite a lot installed but if there are any items with invalid names the game refuses to load. I was able to fix this by filtering out items with empty strings or nil for names in the data-final-fixes file. Can you please look into that?
This is going to be effectively impossible for me to look into without a mod list (ideally a minimal one). Feel free to PR your fix though.
Also another issue: I think I remember this being a problem with the original mod too but removing the base rubber ducky part in the final fixes file causes issues with mods like Krastorio 2 that expect the item to still exist. I was also able to fix this by merely commenting out the lines removing the items and recipes near the end. That doesn't seem to cause any issues during gameplay.
I removed the template item because it was showing up in Factoriopedia. I'll see if I can find a way to change it so it isn't created in the first place.
