I updated fwupd (and later libdfu1 / libfwupd1) to 0.7.0-0ubuntu4.2 this did not resolve the issue for me symptoms are the same as before and same usb error message on startup. For clarification this audio device is a "Native Instruments KOMPLETE Audio 6". Had been away for a few days but can provide any other details as needed.
I updated fwupd (and later libdfu1 / libfwupd1) to 0.7.0-0ubuntu4.2 this did not resolve the issue for me symptoms are the same as before and same usb error message on startup. For clarification this audio device is a "Native Instruments KOMPLETE Audio 6". Had been away for a few days but can provide any other details as needed.