Hi:
You have to make a reservation in the Virtual Lab. If you go into your VLE (Virtual Learning Environment), on the right side of the screen is the pane for the Virtual Lab Reservation System. You need to read the instructions for how to make a reservation to "unlock" the application so you can make your first reservation.
In the VA course, immediately under the video Welcome screen, are the required setup instructions. You need to pay attention to those. Every time you use the VA Hub, you have to start the LASR servers and load the required tables following those instructions.
But you will not find the VA Hub on your personal machine. You access ALL the software and ALL the data through the Amazon Virtual Lab. There are some screen shots in the 1-15-2019 entry here https://communities.sas.com/t5/SAS-Academy-for-Data-Science/Virtual-Lab-recommendations/m-p/527557#M... in a previous forum posting.
Cynthia