Error message "Cannot bind argument to parameter 'VirtualPath' becasue it is an empty string". When editing properties of published app

Hello,

I was able to publish the app. But when I go to edit the properties of app and type in a name under the box

RemoteApp prgram folder

I get the error message "Cannot bind argument to parameter 'VirtualPath' becasue it is an empty string", in red just below the the name of the published app.

Please see attached image