I was trying to get the excellent Ground Control to work with my IOS app. Despite multiple tries, I could not get it to run without an error. It was expecting a file of type application/x-plist but it was receiving text instead.
I couldn’t understand why the demo would work with a file on the demo server, but it would not work with a file on my server. Finally I realized that I need to add a MIME type to my server. So I went into cPanel and in MIME types, added:
application/x-plist and plist for the extension.