Deployments are failing with InternalServerError

I follow the guideline in README.md in order to deploy resources but the deployment fails on:

```
ERROR: error executing step command 'provision': deployment failed: error deploying infrastructure: deploying to subscription:

Deployment Error Details:
InternalServerError: There was an unexpected InternalServerError. Please try again later. x-ms-correlation-request-id: 40a8cf827bda6608812193d637b48c8e

TraceID: 40a8cf827bda6608812193d637b48c8e
```

sample deployment:
https://portal.azure.com/#view/HubsExtension/DeploymentDetailsBlade/~/overview/id/%2Fsubscriptions%2Fafab7bca-9723-4b94-849a-5c371fce9c36%2Fproviders%2FMicrosoft.Resources%2Fdeployments%2Fpkenvfortest123-1739890118

Details of error:
```
{
"status": "Failed",
"error": {
"code": "InternalServerError",
"message": "There was an unexpected InternalServerError. Please try again later. x-ms-correlation-request-id: 40a8cf827bda6608812193d637b48c8e"
}
}
```