On my desktop, everything is fine; on my Android tablet, the Uploaded Files tab isn't working, and never has: I get no sub-menu (new, rejected, etc), and a blank screen with "no items" in the middle. I guess it's an incompatibility issue with the Android tablet, but has anyone else experienced this problem, and more importantly, found a solution?
You need to switch the browser to desktop mode. On your Tablet you probably see the mobile version of the contributor site. The contributor site is not really optimized for mobile devices.