Heya! The other day we did find an issue that was blocking downloads, which is now fixed.
Currently, we are experiencing higher-than-usual traffic, which is causing the My Downloads page to work *really* hard and it's taking the service longer to churn through requests. I would recommend giving your download a few minutes to finish personalizing, or come back later on to attempt to download.
Tried that multiple times three days in a row now. I guess I'll try really early in the morning see if that helps.