Do you have an old V2 you replaced with the V3?
If so, connect the V3 to the back of the V2 and try again. If this works, update the firmware to the latest and you can remove the V2.
Do you have an old V2 you replaced with the V3?
If so, connect the V3 to the back of the V2 and try again. If this works, update the firmware to the latest and you can remove the V2.