terraform - determining which Required Resource Providers require registration: the required Resource Provider "Microsoft.MixedReality" wasn't returned from the Azure API

Terraform error with some weird REST API calls that has the following error message 

determining which Required Resource Providers require registration: the required Resource Provider "Microsoft.MixedReality" wasn't returned from the Azure API

Setting the following resolve it :-

provider "azurerm" 

{  

      features {} 

    # Add this line:

      skip_provider_registration = true 

}