On my Windows 10 computer, I can connect to the VPN using AnyConnect 3.1.02026 without difficulty. However, once I disconnect, I need to reboot my computer to connect again. When I try to connect the second (and subsequent) times I get the message,
"The VPN client driver has encountered an error. Please restart your computer or device, then try again."
followed by the message:
"AnyConnect was not able to establish a connection to the specified secure gateway. Please try connecting again."
If I reboot the computer, AnyConnect will connect (once).
