Hello,
Be attentive, use only Private content area to post private information like access to your Dashboard http://prntscr.com/nwlnrv
1) WordPress 5.x use Gutenberg as a default editor. You need to update WPBakery Page builder (formerly Visual Composer) plugin https://xstore.helpscoutdocs.com/article/37-plugins-update and then disable the Gutenberg http://prntscr.com/mprq5g
2-5) Please provide FTP access also.
6) Clear cache of the browser on your mobile and check one more time.
Regards