Upfront no loading


I see different topics about the same issue, upfront is not loading correctly, no popup, or not loading at all.

It’s a multisite network with domain mapping, exemple on this mapped site : http://chickenyls.com

The background images appears blank and it’s not possible to edit any images, it was working earlier when the site was getting built.

I believe it is a host issue at page.ly, if you could point me it the right direction ?

Access is granted if you need.

Thanks a lot,