On the controller PC, go to this icon on your desktop

When it opens, wait till it shows a green check mark that it has started.

Go to the Token Manager by clicking this: https://localhost:8443/manage/hotspot-manager/site/ou3dhnbk/vouchers/1/50

You may get a notice that your connection is not private.  If so, click Advanced and "Proceed to localhost" at the bottom.

Log in with the credentials provided.  (See Will @ Norman Alan if they are lost or whatnot)

Once in, Click the voucher icon on the left, then "Create vouchers" at the top. 

Set how many you want.  Leave Quota to one time.  Set the Expiration Time to 8 hours.  Click Save.

Click "Print all unused vouchers" at the top and send to your printer. 

If you want to purge all old vouchers, click the select all box at the top, then hit Revoke selected on the right.  You'll just have to create a new batch after that.