There is a rule in the Royal theme CSS that is conflicting with the WPEngine dashboard page in WordPress admin. Specifically, in royal/framework/css/admin.css, on line 862, you have:
.wp-core-ui .modal{
top:4% !important;
}
This is forcing the modal on that page to never go away, which breaks the page (you can click the tabs behind it).
Can you issue a fix?