There should open another window after clicking "Browse Server".
If that is not the case you might try a different webbrowser to check if something in your Browser is blocking it.
If I got the screenshot right, you're using the hosting service of the LimeSurvey GmbH. So you can open a support ticket with LimeSurvey GmbH.
Login and under your profile you'll find a support section. Or use www.limesurvey.org/support
If your LimeSurvey installation or the server is causing this trouble only support can help you.
If that is not the case you might try a different webbrowser to check if something in your Browser is blocking it.
If I got the screenshot right, you're using the hosting service of the LimeSurvey GmbH. So you can open a support ticket with LimeSurvey GmbH.
Login and under your profile you'll find a support section. Or use www.limesurvey.org/support
If your LimeSurvey installation or the server is causing this trouble only support can help you.