Herelink airunit is not connecting to QGroundControl

I have a new herelink Ground unit and Air Unit which I’ve had for more than a month and not even used it for a single time . But today I had to use it and i paired it and it asked for an update of the devices and i have done all the updates, but unfortunately it is not working it shows “waiting for vehicle connection” , The Ground and air unit are paired already but Air unit is not connecting with the QGC, I have already tried to connect in Mission planner too but same problem occurred.
Can anyone please resolve why the Air unit is not connecting with QGC. ?

You need to update the air unit before upgrading the controller…

To recover, upgrade the air unit via usb… see our docs for instructions