Forticlient Ems x Fortigate Connector Error

hello guys, i'm doing an ems x fortigate lab. My Ems, is the trial version, and my fortigate, is VM64 version, unlicensed. I'm creating the Fabric Connector inside Fortigate, and I get the following error "unauthorized certificate" when I click "authorize" I get the error "server certificate or configured certificate is not recognized" have you seen this? obs: my EMS is using a valid certificate. Is it some limitation of Fortigate?