The application starts with a log in screen. After login in it disappears and the actual application is launched, however Test Studio has no time to connect to the second window and throws the following exception:

Element was 'not found'. Criteria: Element 'Exists'.

Page being searched 'WpfWindow_16450718'.

The workaround is to insert an execution delay more than 5 secs after the login. 

The steps to reproduce and access to the application are in the internal description.