Ok, so here is the deal. I have a am hosting website on litespeed shared hosting server and I have litespeed cache plugin. Went to litespeed cache settings -> advanced view -> ESI -> Off (Detailed: http://prntscr.com/jqdogj).
About the “…in the backend dashboard menu -> “Appearance” the “Editor” selection is missing…” I went to iThemes security settings and disabled “WordPress Tweaks”. All is fine now!
I’m having the same issue — and we have WPEngine as our host. I do not have this problem on sites with older versions of Elementor (same host). I don’t see a setting in WPEngine that allows me to clear anything (beyond standard cache — and higher level caching is disabled and we don’t have a CDN).