openconnect Unexpected 404 result from server

[Dimitar Gerasimov]

Hello. I've been using openconnect for several years now. But recently
I start to get this message - "Unexpected 404 result from server" and
can't connect to the vpn server. Openconnect version - OpenConnect
version v8.10-0-bionic1 . OS is Ubuntu 20.04, and I tried the latest
Debian also  The VPN server is Pulse secure device. The Pulse Secure
device is under my control, and nothing is changed there. Here some
logs from Openconnect -

Attempting to connect to server *.*.*.*:443
Connected to *.*.*.*:443
SSL negotiation with ssl.example.com
Connected to HTTPS on ssl.example.com with ciphersuite
(TLS1.2)-(RSA)-(AES-128-GCM)
Got HTTP response: HTTP/1.1 404 Not Found
Transfer-Encoding: chunked
Strict-Transport-Security: max-age=31536000
HTTP body chunked (-2)
Unexpected 404 result from server

Best Regards