How to fix un-compliance in Forti Manager VM in Azure

Hello, everyone

I am a new guy to FortiManager  VM in Azure.  Our company installed one from Azure market place.
But when check security policy I found a few un-compliance against our company.
I try to fix it by installing extensions to VM but get error "VM has reported a failure when processing extension 'AzurePolicyforLinux' (publisher 'Microsoft.GuestConfiguration' and type 'ConfigurationforLinux'). Error message: 'Not supported." 

Does it mean customer is not allowed to change anything on this VM? Only option is to use Forti Mananger in it?