cache custom modules themes data upload are in public/legacy
Permissions where the point.
On this side
one can read
find . -type d -not -perm 2755 -exec chmod 2755 {} ;
find . -type f -not -perm 0644 -exec chmod 0644 {} ;
obviously I set permissions this way
So setting all to 755 and setting the dirs cache custom modules themes data upload to 775 solved it.
Runs now as it should.
Thanks a lot and best regards.