Cannot close service studio. Popup appears with only a title and there is no other information or errors visible.

How to close the Service Studio?

Did you try killing it through task manager once . It happens sometimes. Once restarted it works fine though . 

Hello Dennis.

Try to close service studio directly or try restarting your system directly.

It happens sometime due to some files errors.

Hope this helps you.

As above said Task Manager Kill process work in this case if still not worked then please try to restart Outsystems Services once