Hi!
I can not copy any activity, it shows error message.
I tryed to delete all activities via the watch and via the mobile application, reboot system.
Than I tried to delete FIT files from folders \GARMIN\SLEEP and \GARMIN\MONITOR, as was suggested here:
Also, I tryed to update system version to the lastest beta - 15.0.
But no result.
Please, see video: