ZWO files Apple TV

I can start my customworkout in Zwift but the probleem is that I cann’t save it. In the compagnion app of zwift you see that I am not ready with my workout. Is this a Zwift or a Xert problem. The same issue I have also on my IPhone.

The ZWO file is only a workout definition file. It doesn’t have any information on how to load or save the workout.