I had dd on a Android device. Since it was not on approved list you would not help. It had worked fine untill recent app update. So I loaded it on a approved Apple device and I get the same error. Now what?
If you are getting a waypoints error, you can usually get around it by chaning the direction of the flight by a few degrees.
You also might want to uninstall and reinstall the app and even recycle power on your Apple device.