The Power meter retry calibration always fails. You have to exit and then start again for it to function.
i posted it 2months ago here (in the beta bug report ) with a video: https://forums.garmin.com/beta-program/edge-540-840-series/edge-540-840-series---public-beta-bug-reports/i/edge-540-840-series---9-xx-bug-reports/power-meter-calibration-bug
still not fixed in 9.29...
what kind of powermeter do You have? ( because i got replies from others too as a non-functional feature, so "probably" not NG firmware issue)
