Getting this error in the newest Unity 6:
Android SDK Build-tools component is not found. Make sure all tools are installed in the SDK manager.
UnityEditor.Hardware.Usb:OnDevicesChanged (UnityEditor.Hardware.UsbDevice)
I see there was a similar problem in a previous version and Unity had to resolve it on their end. I don’t know how to resolve the error in 6000.1.24f1