Getting Cookie is not acceptable when using default command

[OctoNezd]

I can't login using default vpn config

Getting this:

openconnect 127.0.0.1 
POST https://127.0.0.1/
Connected to 127.0.0.1:443
SSL negotiation with 127.0.0.1
Server certificate verify failed: signer not found

Certificate from VPN server "127.0.0.1" failed verification.
Reason: signer not found
To trust this server in future, perhaps add this to your command line:
    --servercert pin-sha256:LTaji7NgbIe1xbNc5njgJcQ3y5J0pTT4gM6fASQy51s=
Enter 'yes' to accept, 'no' to abort; anything else to view: yes
Connected to HTTPS on 127.0.0.1 with ciphersuite (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM)
XML POST enabled
Please enter your username.
Username:octo
POST https://127.0.0.1/auth
Please enter your password.
Password:
POST https://127.0.0.1/auth
Got inappropriate HTTP CONNECT response: HTTP/1.1 401 Cookie is not acceptable
Creating SSL connection failed
Cookie was rejected by server; exiting.

[aminvakil]

Yep, it's a known issue, my openconnect servers do not work as well.

https://gitlab.com/openconnect/openconnect/-/issues/659