Jadyr Pavao and I have the same issue. Update: It looks like AnyConnect and the nacl-development-environment plugin may have a conflict. Following Pete's recommendation, I removed the nacl-development-environment plugin, removed and reinstalled AnyConnect, and vpn is working again. Cisco AnyConnect is a web-based VPN client which does not need any client end configurations. In this article, we will share the download links to the latest version of Cisco AnyConnect Secure Mobility Client.

Available for OS X, Windows, Linux, but unfortunately I didn’t figure out how to use it with OpenConnect when using public key authentication.
OpenConnect Public Key Authentication
Open Connect Server Configuration (Working for iOS)
OpenConnect on Ubuntu

Download: http://dl.sskaje.me/anyconnect/ /nissan-consult-iii-software-download.html.

Username: sskaje
Password: sskaje.me

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