Need some help with connecting FortiGate to FortiClient EMS

I've installed EMS (v. 7.2.9 but I've also tried with 7.4.3) and activated a trial license on it as well as on my FortiGate-VM (v. 7.4.4). Trying to connect EMS with Fabric Connectors on FortiGate, the ping is going, it establishes a connection, I'm accepting the certificate and then I'm getting "FortiGate not authorized" notification. As I understood, I should authorize it from "Fabric&Connectors->Fabric devices" menu on the EMS, but the FortiGate doesn't appear there. What should I do and is this possible with trial license?