We couldn't log you in (Garmin said 'session_expired').

Hi! Brand new cycle.travel user (experienced in GIS, GPS, etc). I created an account on the website, created a route, saved, tried to send the route to my Garmin Connect account (into which I am logged in). CT throws an error "We couldn't log you in (Garmin said 'session_expired')." No big deal, I will download the tcx or gpx files and will send them to my device myself. But I thought this "session_expired" error was strange.