I believe I have exactly the same problem. I built my site the 10th and updated one page today. In the backend everything’s visible, so nothing has been deleted, but in the front end it’s just an empty page.
I did the following thing:
Installed wordpress + theme this monday the 10th. Did some changes on the 11th.
Updated the Quest theme. Everything looked great still.
The today, I made a small change on the “home” page and – all content gone in front end
Just to see where the fault might be, i tried changing the home page to a test page without Page Builder plugin – and it worked.
I then tried to update one of the other pages built in page builder, and immediately the content was seemingly gone in front end.
So it seems to me that the latest update of the Quest theme did something with the page builder plugin that now makes all updated pages “disappear”.
Here’s the site: https://pedagogisktcentrum.se/fhc/
