Invisible popups @ remote desktop

I’m googling for solution and it seams that nobody ever had similar problem.

Connection works fine - but when CIS want to show some popup there nothing happens. Popup window invisible on remote desktop. So I can’t accept or deny access, delete file with virus etc.

Check after reducing the hardware acceleration to none on the remote pc to check whether it’s fix the problem, if not provide some more information about the pc you are connecting to and the tool you using to connect