A tester reports that adding an empty folder to Gridsync results in an infinitely looping "loading" status. This is due to the fact that Gridsync depends on Magic-Folder's status API to gather status information about folders but Magic-Folder naturally doesn't report any such information in the event that the folder is empty (and thereby leaves Gridsync -- and the user -- waiting until such files are added).
As a means of eliminating this wait/confusion, the tester suggests "A warning or error message instructing the user to upload a folder that is not empty".