Can't connect to VPN using Google SSO with forticlient

[C11-3E]

I added SSO login to VPN with these guides:
https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Companion-for-troubleshooting-SSL-VP... 

Currently, I can connect to the VPN using SSO via the SSL-VPN realm link, connect and it's working great.
When I'm trying to connect via FortiClient I have an issue, if I connected to a session from the SSL-VPN realm portal it opens the browser with the session, if not it will open 'This page isn’t working'.
On Google Workspace side and on FortiGate side, everything looks OK in terms of configurations. The fact that I can connect to a session with the SSL-VPN realm portal prove it.

I'm trying to troubleshoot this issue with no luck, what am I missing?

I'm using FortiGate 60F version 7.2.9

[salmas]

Hello @C11-3E 

Did you try clearing FortiClient cache ? Check this link for same .
https://community.fortinet.com/t5/FortiClient/Technical-Tip-Disabling-auto-caching-on-VPN-login-usin...
After you clear cache, shutdown FortiClient or restart PC.

Also try with disabling "Use external browser as user-agent for saml user authentication" under FortiClient VPN settings . Shutdown FortiClient and connect again.

salmas