After you've clicked "Launch Virtual Lab" from the sidebar in the virtual learning environment, entered the log-in information, and are now looking at the "Citrix Receiver" page. In the top right there a "liveweb/vleuser-####" menu. In that menu select "Change Citrix Receiver". Does it say you are using the "light version"? If not, try changing to the light version and then opening the SAS Studio App.