I decided to connect my tablet to the controller and now the app will work. But if I try with my phone it will not. With my phone, I have the message "check version", which doesn't do anything but stay up. Sometimes it connects and disconnects repeatedly.

I would use my tablet, but it's large. But will work.

Anyone know what kind of problem I'm having?

Are you using the same version app on the phone? make sure it is updated.