Hello,
Please check wp-admin access – https://gyazo.com/452ca9af837005220a9b7aefaff8a428
We don’t need cPanel. We need only FTP: FTP host, FTP username and FTP password with access to your WP installation files. Contact your hosting provider if you don’t know what FTP is. Server error logs and information about server cache you can get from the hosting provider also.
Regards