Sometimes the sensor may have a build up of bugs or other substances blocking the radar. I would suggest giving it a quick look before contacting Service and attempting a scroll wheel reset. If that does not work then I would contact Service.
Per toolbox case #76618, camera and radar both require calibration. Successfully calibrated both the camera and radar. Performed function test of brake light switch, switch is operating correctly. Vehicle operation is norm
I've not seen the camera error, but the radar error pops up randomly every week or so. It seems to revert to working after 10 minutes. Of note, the error has popped up three times in the same stretch of road (a long, relatively narrow HOV lane flyover) in both directions. Maybe RF interference, but it's weird.