Now I tried (based on @olf recommendation):
ssu lr
It shows in the beginning:
WARNING: ssu.ini does not seem to be writeable. Setting values might not work.
and than it follows with a long list of
Enabled repositories (global)...
etc.
Well, the “long list” is what I wanted to see, so please (as written before), do paste the output of ssu lr
in a section between two lines with solely three backticks (```) in it. (This is most easily done at an PC when being logged in to your SFOS device via SSH.)
BTW, I changed the title, because this has nothing to do with Storeman.