1. Looks like the problem relates to Massive Addons plugin. Please read this reply from author of Massive Addons plugin https://codecanyon.net/item/massive-addons-for-visual-composer/14429839/comments?page=36&filter=all#comment_14143143 https://prnt.sc/hmu4qh and follow their suggestion.
2. I’ve checked the screen options button with a default theme and got the same problem. This means that the issue doesn’t relate to our theme. You can contact the wordpress support.
Regards