Any help

Hi Carls,

As a start you can refer to following article Unable to login on SSL VPN (48 %) using S... - Fortinet Community

Credential or SSL VPN configuration is wr... - Fortinet Community

Do share the FortiClient version, FortiOS version, error log from FortiClient debug file and vpn debug as per the article shared.

I'd investigate FortiGate logs and see if there's a clear indication of what's wrong. If you hit the wall, you can follow the steps in this article and contact support with the data gathered: Collecting logs for addressing VPN connec... - Fortinet Community