I’ve raised with support, but when I try to launch a workout I just get a blank screen. This occurs on the mobile app and the MacOS app 
I had to do it manually on the wahoo app in the end, very frustrating
well, it seems to be working again
There was an issue with Apple-based apps recently, which sometimes required the app to be restarted a few times before everything worked again after they fixed the issue on the servers.
Sounds like you ran into that one. If so, it shouldn’t happen again
Sorry about any trouble!
Please let us know if you have any issues moving forward. 