Good day Ismael,

I’ve looked at the suggested setting and it was set to “Use Block Editor”. Changing it to “Use WP Classic Editor” worked!
The strange thing is that i’ve never changed this option myself, so it must have started when WordPress changed to gutenberg.
I thought I had created new pages after that, but I guess I never did.

Thank you for pointing me in the right direction.

Update: Found out there was a new token system instead of the AP key method, so updated the information to make the update check work again.
It now sees the new update, but unfortunately it now says: An error occurred while updating Enfold: Update package not available. when trying to update the theme.