While provision a new ANC there is an error

Question

While provision an new ANC there is an error occurs.

Errors shown:

A required DSC script cannot be accessed or run.

Possible Solution

During provisioning, some PowerShell DSC scripts are executed on the Cloud PC. We were unable to either download these DSC scripts or execute them. Please ensure your vNet has unrestricted access to the required endpoints, and that PowerShell is not blocked in your environment or Group Policy.

Background:

I have only one IP address Pool for my Vnet. Due to the lack of IP address, I have added new subnet in the same VNET.

But the only different this ANC with other ANC is just the subnet is different. It is still under same Virtual Network. The is still be able to provision with Cloud PC. It is still be able to communicate back to own network even using the new subnet, new security group and new resource group. Not sure what is the issues.

Hope Anyone having experience that can help to resolve the issues.