Connection could not be loaded

I've named my connection same as SSL VPN Remote access policy and another same as Sophos Client Connect Name in XG. However, I'm always getting the same error message.
I know that the client does connect to the user portal as I'm getting another error with wrong login credentials.

In scvpn.log I see "err Failed to download the configuration: <name>"

What would be the issue here, do I may need an XG V18? Currently I'm running V17.5.11.