Dashboard permission errors after restart

Metabase has been working fine for years. We decided to reboot the server and now only some dashboard elements load. The others just say: Sorry, you don't have permission to see this card.

When i look at the javascript errors, it says (Unauthenticated).

I own the system and I am the admin. I should have access to everything.
All the groups are the standard groups. I resaved them just in case with no effect.

Is there a way to reset some sort of cache?
We are using the Postgre database.

Cheers,
M

What version are you running? And are those questions made from Hidden Tables by any chance? Like the question itself is using a Table that you're able to see in the Admin -> Table Metadata?