There are two options to set return to home.  I dont have any issues with the first one (Land based,) but I have a problem trying to use the 2nd option (Using the controller as the return to home location.)  When I select that option I get the Weak Mobile Device GPS Signal can not aquire location messages.  Can anyone provide some guidence to help me figure this one out.  I used a tablet with the same result.

I seemed to have fixed the issue, but now my GPS screen on the app is black..  Gerr.. how to fix?

What device are you using in the controller. Is it a mobile phone or a tablet without cellular connection?
Also is it Android or IOS?
The controller gets its location from the GPS in your phone and if you are using a Tablet without a Cellular connection and out of WIFI range it wont pick up a location.