Unable to choose an application window

Hello, 

I am unable to refresh the application window list

When I click on the refresh button, it keeps on loading and I finally get this message: “A network connection issue has occured. Please stop the operation and try again” but my network is working fine.

I am facing the same issue for other Actions that has the “Select window” option and also when I want to create a window Variable and select an application.

Has anyone already faced this kind of issue ?

Any clue on what could be the reason of that ?

Thanks in advance.