UE4: Instant Preview "Not connected to Editor"

~ 0.5 Minute Read.

Time and time again I had issues connecting android devices to my PC in a way that the Daydream Instant Preview would find the Unreal Engine 4 editor.

If your device is connected via USB, it can be a matter of

adb kill-server

to solve this issue. This is assuming your device is found by adb, check with:

adb devices

If your device is not listed, resetting the USB-debugging permissions (the list of PCs allowed to debug your device) may also help, followed by rerunning that command.

Written in 5 minutes, edited in 1 minutes.