Pleae update your ticket with proper temorary admin login and FTP details so I can check on these issues. There are no known causes, so it’s impossible to tell without even seeing it. I suspect some kind of plugin conflict, but I’m not sure.
You can add these details by editing your first post in this thread or by attaching a .txt file with them. Both methods are safe and only visible to me and you.Best,
If you like my products, don't forget to rate them on codecanyon :)