Connectivity between smartphone app and camera

I tapped the picture from the camera to update it and the display just keeps “filling” with a “connection failed” error message. Why is this happening? I obviously need to reset the camera with the app.

I have been having the same problem


I have two cameras in the SAME room but on opposite sides. One states “connection failed (-90)” and the other one is fine. ANY ideas why one is failing and the other one is not?