Hello.
We loaded the latest version of Enfold theme v 5.6.3
An old issue has come up again. The preview button won’t show changes.
In the past, to fix we would switch to the wordpress block editor and
click the “Attempt Block Recovery” button
Save page
refresh browser
switch back to Advanced editor
save
This sometimes works temporarily, then after a couple more updates and saves, preview stops working and “unexpected or invalid content error appears