Hello,
related problem: visual editor is not loading. The page is running fine, so I want not touch too much.
BUT! It is running on the very old ENFOLD v1.5.1.
I bought a new license yesterday v.3.2.2 but could not find a tutorial to upgrade.
I was not able just to install the theme, the message was: folder is already installed.

I will not destroy the running page, therefore I´m careful what I´m doing because I have just to add 1 new portfolio-text.

Best regards,
Robert