Could not connect to UiPath Robot Service when run (F5) .xaml

[linux_777 (Manh Duc)]

Dear all
I’m Rookies of this field. As duty on new project in company, i have to research about RPA and UiPath also.
When i try to some examples using Ui Robot. Althrought i already connect to orchestra and make one Robot. But when click F5 on my example (Guess Number), Robot not running. Studio windows just minimize and maximaze again on my desktop.

Please help to check what happen with my example