In Cisco web site, it is called Network Topology View whereas, in the LMS Topology Services Main Window, it is called Network View. After launching the Topologies Service Java plugin, if the hour glass icon does not go away within a minute, there is a good chance, the membership needs to be recomputed.
In the LMS browser window, navigate to Inventory, Groups, Device. This will lead to the same screen as Admin, System, Group Management, Device. Navigate to the highest tree on your inventory group and on the right side of the window, you will see the buttons, Export, Import, Create, Edit, Details, Refresh and Delete.
Click on the Refresh button. Next, a window pop-up will prompt to confirm re-computation of membership of user groups. Click Ok. Relaunch the Java plugin and you will be able to display the Network View.