Did you ever figure this out?    You wouldn't happen to have a site-site VPN connected as well would you?  I am running into the exact same issue that you have.  However, I have a site-site VPN connected, and found that when I disable VPN availability for all the VLANs I configured it for I'm able to make the client VPN connection.  Same goes for when I just take the site-site VPN down.  I'm probably going to have to call support to help figure out why this is the case. ... View more

You wouldn't happen to have a site-site VPN connected as well would you?  I am running into the exact same issue that you have.  However, I have a site-site VPN connected, and found that when I disable VPN availability for all the VLANs I configured it for, I'm able to make the client VPN connection.  Same goes for when I just take the site-site VPN down.  I'm probably going to have to call support to help figure out why this is the case. ... View more