Hello,
1) Never post your credentials out of the Private content area on the right side! Because all the users have access to the main message area. The private content area is visible for support staff only.
2) I asked you about FTP access to your site. We need that to check the code of plugin and code of theme and try to make code changes to add compatibility.
File manager from WP Dashboard access won’t help us. We need FTP.
Regards