Failed on FortiClient VPN with SSO Login on MacOS

Hi,

I have a trouble on ForciClientVPN on MacOS.

When I tried on Office365 SSO with FortiClientVPN, VPN client stack with the white window like blow. 

The reason why it fails is that FortiClient fails to load kernel extension for login.

When I login with ID and Password, it automatically ask permission (i have to authorize on Security and Privacy on MacOS setting). But SAML login, it does not.

It happens only in the first time.

If l login ID and Password and authorize app on Security and Privacy setting, SAML login also works.

Is three any way to avoid the issue?

Thanks,

Junya