I have a Phantom 4 pro 2.0+. In the past I've had no issues getting a zone or custom unlock... importing it into the controller... seeing it under unlock licenses... BUT when I hit the blue icon to import to aircraft... I get a screen that comes up showing me the license... BUT that's it... won't download to aircraft. I've logged in and out of DJI 4 app... but no success. Help please!