Can’t see or edit content after updating to latest wordpress

Hi!

I did some overdue maintenance on my site today, and after updating all plugins, WP, and themes, I can’t see some of the content in the back end.
Generally speaking: I can see the content on most pages, but it doesn’t look like I can use the site origin page builder there (which is activated by the way).

But the major issue is on my homepage: i cant see any content there, so can’t make any edits. On the front end, everything is fine. So the content exists.

I’ve tried disabling all of the plugins, deactivating Gutenberg, clearing cache.

Now, I’m at a loss.

Can you help?