Unable to access Windows Admin Center (extension) on Azure VM

Installing the Windows Admin Center extension on an Azure VM and the portal is showing I am still unable to connect.

Inbound NSG rules are allowed for ranges to port 6516 along with Service Tag WindowsAdminCenter

Outbound rules are set to default allow all and Powershell script

Invoke-RestMethod -Method GET -Uri https://<your_region>.service.waconazure.com

Returns: Microsoft Certificate and DNS service for Windows Admin Center in the Azure Portal

Firewall is showing allow access to port 6516 and Windows Firewall on server is disabled for testing purposes.

I have uninstalled and re-installed the AdminCenter extention, but I am still unable to access the https://localhost:6515

{

"error": {

    "message": "File not found",

    "code": "NotFound",

    "detail": ""

}

}