My latest activities wouldn't sync with Garmin Express or the new Garmin Interface.
It first started with an error statement. Then when I synched again, I wouldn't get any error, but my activities wouldn't upload.
I had to go to the old web site to make the synchronization work.
I'm using a Garmin Fenix with a v 4.7 software. (By the way the new website keeps telling me the version I use is 4.5).
There seems to be work to be done on the new website.
Jean-Loup