I have had no problems at all with Classic Garmin Connect, but when accessing Modern Garmin Connect, the Devices widget says I have no device on Garmin Connect.
It invites me to add my device using Garmin Express - my Forerunner 10 is already registered and on Garmin Express, and when clicking the link provided, this is confirmed.
Anyone know how I can get Modern Garmin Connect to recognise my device?