The first code shows a mechanical malfunction with the diverter valve (N249). It's electrical on these so I would remove and inspect and if possible perform component activation on it to check movement.

Regarding the second code I would check fuse 20 in the engine bay and then the wiring to the SC clutch.

The third code is probably a result of the second as the supercharger will not work without the clutch engaging, hence the lack of boost detected.

Matt