Hi @Anonymous ,
Could you share more details with your error? Can your app play well when editing in App designer?
What is the link of website in your posted image?
If you want to open your Model-Driven Apps, you can open it from the PowerApps Potal - Apps, then find your App and open it.
In the other way, you can click Microsoft Dynamic 365 to see all Apps from PowerApps and Dynamic 365, you can also open you apps in there.
Please have a try and check if you can play your Apps properly.

Best regards,
Sik