If you face an issue like missing Pre-made website content or broken Theme options page layout, the theme installation is probably not complete and some files might be missing.
To fix this issue, access the The7 developer dashboard by adding /admin.php?page=the7-dev&tab=install to the end of your site wp-admin URL. Then the URL will look like this
(Please note that this page can only access using URL, no menu item available for this)
and click Re-install The7