I'm assuming this is related to the new K2SO patch that includes this change:

• !! Removed duplicate rocket fuel from ammonia in favor of K2 recipe

Trying to load up now gives the following error:

Failed to load mods: Error in assignID: recipe with name 'ammonia-rocket-fuel' does not exist. It was removed by Krastorio2-spaced-out.

Source: dea-dia-petrolic-bacteria-extraction (technology).

Report it back to k2so, any fixes I can do will break Dea Dia itself. They did the kind of change they should not have done.

I'll release a fix for the crash, but for this version I won't take responsibility if you can't craft rocket fuel anymore.

Fantastic! Thanks for your hard work and for fixing problems that shouldn't have become problems in the first place.

I actually did not need to do anything in the end, k2so fixed it on their side by keeping the name of the SA recipe. :)