SSL VPN connects successfully but then immediately disconnects

Hi

I'm having a problem with a new laptop that cannot sustain a SSL VPN connection using the SecuExtender 4.0.5 client to a USG 40. The laptop is running Windows 11 Pro but I have another two laptops running Windows 11 Pro and the SecuExtender 4.0.5 client which are working without issue.

Looking at the log entries, see attached image, the connection is made, logon is completed and then after 20-30 seconds the user is logged off and the connection is closed in an apparently orderly sequence.

I have tried to resolve the issue by: reinstalled the SecuExtender 4.0.5 client, updating WiFi drivers on the laptop (the laptop does not have a physical LAN port and is WiFi only), tried different SSL VPN user account, disabled firewall and intrusion detection on the laptop (ESET). But none of these changes have made any difference.

Can anyone suggest what could be causing this and how to proceed to a solution?

Thanks

Alan