Different behaviors when connecting to VPN

[iaef]

I have two VPN gateways that I have been using without problem, until this week.
One still continues working ok. But the other one is now giving an error.

Using the terminal command: openconnect --protocol=gp https://{gateway URL} it gives me a message that says something like:
SAML REDIRECT authentication is required via https://login.microsoftonline.com/e86b4922-...
By clicking on that link I get a success message:

So, I assume that the problem must be, either:

• A change on the client, or
• A change on the gateway version

Can someone direct me on what I must do to grab the logs and gateway details to be able to have more information to search for the fix?

[iaef]

Additional information: I've been told that the gateway that works ok is a split tunnel, while the one giving me the error is a full tunnel.