This is a known issue but the team is taking care of it.
Back in 2011 Skate.Reel and Skate.Graphics features have been retired. Although Skate.Reel has been retired, the content can still be shared within the game so the skate share pack is still available and is now free of charge.
More information available here:
This said, currently there is an issue preventing players from using some of the online features but our engineers are actively working on fix.
You can follow the updates here: Game Session No Longer Exists / Online service
