Radio Not Ready fault during first set up (+can't fit mag 1 fault)

Hey everybody, I’m pretty new to this stuff. I’m connecting a RadioMaster Pocket to a Pixhawk 2.4.8 clone through an RP3 RadioMaster receiver. The devices are all charged, and the radio is bound to the receiver. But when I go to QGroundControl to set up the radio, every time I press Calibrate, I get a message saying, “Radio Not Ready, Please turn on transmitter” (attached below). I know that the radio is connected because when I unplug the Pixhawk, the radio says, “Telemetry lost”. So what should I do now?

Also, when setting up the Compass, I keep failing because of a “can’t fit mag 1” fault (see attached). I suspect that either the compass in the Pixhawk or the GPS module is faulty. Not sure if this is related to the issue above though. Any advice would be appreciated. Thank you.

Processing: Screenshot 2024-01-14 174016.png…
Processing: Screenshot 2024-01-15 224045.png…