The theme has one of the pages that when you modify the content and click to save ... it keeps thinking and never saves. There is some kind of problem with this. How is it solved?
Please share with us your PHPINFO file. It's really necessary right now.
If you do not know how to do it, please check this topic:
Also, please, turn off all of the plugins, refresh your cache, and check if the problem persists.
Moreover, if you use a child theme, switch to parent, and recheck it.