I am on the latest MM version, but something screwed up in the background.
I did load the backup with MM 2.16 and started over again. No success.
Eventually I loaded my oldest available backup with MM 2.9. Interestingly, all modules still worked in this old setup incl. MMM Fuel. From there I updated the MM to 2.17.1 and surprisingly MMM Fuel kept working.
Apart from the fuel module 3 other module seem to be incompatible with latest MM version resulting in a black screen on startup. Most likely some required dependencies got removed in the MM core.
It would be great if we could introduce a community maintained compatiblity list of all 3rd party modules. I mean the status “maintained” or not gives a hint, but it does not necessarily mean it will not work any longer.
For now, I am happy.