We are aware of an issue that is keeping some workouts from loading in the Android app, specifically for users on version 21.6.0. Please know that our development team is investigating the cause and believe we have a solution in place in the next version of the app, version 21.7.0, which is rolling out now.
Until you're able to download the latest version, you should be able to view all of your workouts on our website if it is not loading in your mobile app.