PreArm check RC not calibrated

I’m setting up my first quad with Navio2 and ArduPilot. The APM Planner keeps telling me “PreArm check RC not calibrated”. When I go to the Radio calibration area I can see 4 out of 8 channels reacting to my input… I tried calibrating but nothing’s changed.
What am I doing wrong? How can I calibrate the other 4 channels?
I’ve got a Taranis X9D plus with an X8R receiver.

Yesterday I made it working after setting up more channels on the transmitter (some switches and pots) so that the rest of the radios could be calibrated. Now Navios LED is blue.

Sorry I did not get back to you in time, but happy to hear you got it all sorted. If you have any other issues just let me know!