Just noticed the uplay rewards aren't loading properly either, so i guess the servers are having a hard time.
There was a Club Maintenance earlier today that could have caused these issues. It should be complete now. If problems still persist, please reach out to our Support Team
This just had to happen when I finally pass the Green Belt ninja track. Got the connection error after finishing so I'm not on the leaderboards despite having got silver on it. And I really do NOT want to have to play it again.