Ipads...ipad air 4th gen

Hi All,

Just joined the Litchi forum.
I have a Ipad air 4th gen than is not connecting when using the App. I have have an ipad mini 4 which connects ok. I know the ipad is not compatible on DJI go 4 , same for Litchi?
On the ipad mini the camera image is not showing when connected, any ideas
Drone is Phantom 4 pro.

Many thanks