Preview button does not work when enabling the V7 version of the magnolia pages app. You can reproduce this problem on the demo.

Steps to duplicate

Enable the older version of the pages app by removing it from the hidden apps list within configuration:browser;/modules/ui-admincentral/config/appLauncherLayout/hiddenApps.

Remove the “pages” node.

Access the newly unhidden pages app

Click the little eye icon on the bottom right corner of screen to preview

Expected result 

You will see preview

Actual Result

Nothing happens.

Note

You will only see the preview if you click on the white section below the button. See screenshot attached.