Due to the growing number of XSS vulnerabilities in WordPress, we restrict access to the editor for user roles without 'unfiltered_html' capability.
The capability is enabled by default for Super admin, Admin, and Editor.
If you wish to use Visual Composer by other user roles, make sure to enable 'unfiltered_html' capability for a specific user.
Also you can implement it by adding this code in theme functions.php:
function author_level_up() {
// Retrieve the Author role.
$role = get_role('author');
$role->add_cap('unfiltered_html');
}
add_action( 'admin_init', 'author_level_up');Additionally, to control 'unfiltered_html' capability, you can use User Role Editor plugin.
Note: If you are a Contributor, Author, or another non-admin or editor user of the site. Please contact your site administrator.