I am experiencing this issue with Xcode 12.0 beta and I have iOS 14.0 beta on my device. It was working perfectly 2 days ago and has suddenly stopped workng.
I've tried: Restarting my MAC
Connecting usb-c to the device
Using an adapter and connecting usb - device
I'm running macOS 10.15.4 and do not have iTunes (there is no itunes for this OS)
Anyone experiencing this issue with Xcode 12.0 beta? I could use some help here since i've been blocked for 2 days now and need to run on device to access the camera