i just upgraded my client to the newest factorio version of 0.17.67 and i got an error with i think momotweaks, so i turned it off and now i got a second error which it was this one:
Sorry, have only gotten around to this right now because college just started back up, the link doesn't seem to work anymore (gives a 404). Can you give another link?
Sorry this took so long, this appears to be caused by omnilib.marathon.standardise() separating the ingredients key of a recipe into distinct normal and expensive ingredients keys, causing the error. I will release a fix for this soon.