I've tried this logged while logged into the same campaign on production, cleared cache, used multiple browsers and so on to no avail. By default it shows "Loading Recent Uploads" with a 'working' circle going continuously. The "Upload" and "Add" buttons are completely absent. Doing a search shows "Searching Your Library," "Searching Purchases," and "Searching the Web" with the 'working' circle eternally as well. There's just ... nothing. Anything I'm missing here?