I'm trying to get Cisco Anyconnect working on a fresh install of Ubuntu 18.04. The vpn I'm connecting to requires 2fa, using Duo Mobile push or a text code. The program connects fine, and I enter my login information and verify the login requires using Duo on my phone, but the gui then hangs with the message "Please complete the authentication process in the AnyConnect Login Window".
On Ubuntu 16.04, authentication of 2fa was followed by a popup window where you had to click "Accept" to finish the connection (see figure 1). It seems that this window is not appearing on 18.04, preventing me from finalizing the connection. Any thoughts on what's going on here?