I knew you were an island man !
I finally found out and solved my issue with forever loading content manager.
It turned out to be the simplest of the things:
just a typo in one of my scenery manifest.json files.
one of the title’s end quotations went double while trying to keep my titles clean and tidy :
as “xyzq - wxyzq airport””, I just removed one of the last quotations as it should be “xyzq - wxyzq airport” and worked like a charm as expected.
a typo but cost me one whole week but happy finally figured it out and solved.
my content manager is now back up and running again.