Connected, installed app, cannot run app

I am trying to see if this environment will help me see an app as my users see it – on one of the new S20 devices. This works:

  • reservation
  • install app – either with create new + install or with test -> install
  • manage apps shows my app in the list

But then, I cannot run any app. Neither my app nor any other app on the devices. I am clicking on the ‘Start’ button. Is there another way to start the app?

I see others who are having various problems and the advice is ‘try again tomorrow’ or some such. Is that the case here?

Thank you for any help.