Activity

I think I solved this one. You don’t have a default css style for this div:

.is-mobile.single-item.groups .page-right-sidebar, #primary {
}

If you do not choose a background color in the customizer it will appear as transparent and give the impression the div is broken.

If you want to test it you can go into the page with Firebug (or some other web editor) and cancel out this css:

http://demo.buddyboss.com/social-learner-sensei/members/guest/

.is-mobile.single-item.groups .page-right-sidebar, #primary {
background-color: #e3e9f0;
}