Failed to open tun device: No such device

[ATahma]

• Distro: Arch Linux Rolling 5.5.1
• Pip version: 19.3-1
• VPN server: securevpn.mcgill.ca Attempts to fix the issue:
• Removed openconnect-sso, removed config files at /home/[username]/.config/openconnect-sso and reinstalled using # pip install openconnect-sso
• Reinstalled openconnect
• Tried connecting using another device (My android phone Cisco AnyConnect app) and it works without any hiccups Here is my return log after trying to connect:

  [me@hostname]$ openconnect-sso --server securevpn.mcgill.ca
  [info     ] Authenticating to VPN endpoint [openconnect_sso.app] address=securevpn.mcgill.ca name=UNNAMED
  [info     ] Response received              [openconnect_sso.authenticator] id=main message=Please complete the authentication process in the AnyConnect Login window. title=Login
  [info     ] Browser started                [webengine] startup_info=StartupInfo(url='https://securevpn.mcgill.ca/+CSCOE+/saml/sp/login?tgname=DefaultWEBVPNGroup&acsamlcap=v2', credentials=None)
  [info     ] Loading page                   [webengine] url=https://securevpn.mcgill.ca/+CSCOE+/saml/sp/login?tgname=DefaultWEBVPNGroup&acsamlcap=v2
  [info     ] SIGNAL handler                 [webengine] 
  [info     ] Exiting browser                [webengine] 
  [info     ] Browser exited                 [openconnect_sso.browser.browser] 
  [info     ] Response received              [openconnect_sso.authenticator] id=success message=
  [sudo] password for me: 
  Connected to 132.216.255.250:443
  SSL negotiation with securevpn.mcgill.ca
  Server certificate verify failed: signer not found
  Connected to HTTPS on securevpn.mcgill.ca
  Got CONNECT response: HTTP/1.1 200 OK
  CSTP connected. DPD 300, Keepalive 20
  Connected as 132.216.232.169, using SSL + LZS, with DTLS + LZS in progress
  Established DTLS connection (using GnuTLS). Ciphersuite (DTLS1.2)-(ECDHE-RSA)-(AES-256-GCM).
  DTLS connection compression using LZS.
  Failed to open tun device: No such device
  Set up tun device failed
  Unknown error; exiting.

I'd really appreciate if somebody could kindly point me in the right direction, I might be able to figure the solution out myself.

EDIT: Formatting

[vlaci]

The error is coming from the openconnect process. Have you upgraded the kernel recently? If so, please reboot your system and try again.

Background: Arch Linux has an issue that it cannot load kernel modules for the running system because the upgrade removes them.

[vlaci]

Is the issue still present?

[ATahma]

the issue was fixed upon updating and restarting -- thanks! Closing the issue