If you find that your friend list is not loading inside of Social Prospector you need to verify that you have a username created for your Facebook account.
Here is an image showing where you need to go to check if you have a username created for your account as well. Go here directly to the page shown in the image below
If after following those steps you are still having issues loading your friend list then please submit a ticket so that our support team can take a closer look: Submit Ticket