After uploading the .gpx track from my tomtom watch and filling in the data like board, sail and fin type, I press Submit.

When looking at the my session page I do not see at the botom any saved tracks, it only displays, "No data found"

At the right hand side it shows me my PR's, so the uploaded data is somewhere on the server, right?

Please help me to understand.

After waiting fo 1 day the issue is solved.

Probably you have to wait for a server update.

I have the same issue, waited a few days but results still don't show up

I have the same problem!

Same problem !

Please forward your .gpx track to info@gps-speedsurfing.com and we will check it out. Most likely caused by missing datapoints in the .GPX file