I updated the mod to 1.3.0, and now the game doesnt load. There seems to be a unhandled exception in this version

Failed to load mods: ExpandedProductivityResearch/functions.lua:1483: attempt to index field '?' (a nil value)
stack traceback:
ExpandedProductivityResearch/functions.lua:1483: in function 'adjustProductivityTechnology'
ExpandedProductivityResearch/functions.lua:1445: in function 'generateAllProductivityTechs'
ExpandedProductivityResearch/data-final-fixes.lua:40: in main chunk

That is a very weird error. What other mods have you active? Are there some which add productivity techs?

edit: basically, unless I'm missing something, the mod is trying to adjust a productivity tech for a recipe which has no results.

edit2: I can push a generic error handling later tonight, but I'd like to understand, how this error came about. Especially, because I cannot reproduce it on my end.

I've push 1.3.1 which contains some exception handling, but since I cannot replicate this particular error on my side without further input, I'm not sure if it will work. Also, even without the error, something else might be going wrong, so I'd appreciate your mod-list.json so that I may hunt this bug down. :)