FortiClient for VPN keep prompting to join gateway for telemetry

Hi all, need some help here. I have a FortiGate with UTM and installed FortiClient for VPN to endpoint. FortiClient keep prompting users to connect to the FortiFate for telemetry and occasionally users will click OK. FortiClient will then flag the system as uncompliance and proceed to block the user from the network.

I had tried to follow the guide to disable Telemetry on the network interface and configure the Security Profile > FortiClient Compliance, but those options aren't available.

Appreciate if someone can advise me. Thanks.