IaC - private-network-standard-agent-setup - Failing

[jason-theodorakopoulos]

Deployment using the 'Deploy to Azure' wizard in infrastructure-setup/15-private-network-standard-agent-setup fails giving the below error.
Deployment is done in a new empty resource group with no existing resources or Vnets , so the bicep is creating everything from scratch.
Any ideas on where to look to debug? @geabdluca @sansinh @fosteramanda

{ "code": "DeploymentFailed", "target": "/subscriptions/***/resourceGroups/***/providers/Microsoft.Resources/deployments/ai-aiservicesn4lt-n4lt-deployment", "message": "At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-deployment-operations for usage details.", "details": [ { "code": "ResourceDeploymentFailure", "target": "/subscriptions/***/resourceGroups/***/providers/Microsoft.CognitiveServices/accounts/aiservicesn4lt", "message": "The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'.", "details": [ { "code": "OperationError", "message": "Failed to Create the resource. Provisioning state: Failed", "details": [ { "code": "ResourceProviderError", "message": "Failed to create Aml RP virtual workspace due to System.Exception: Failed async operation\n at Microsoft.CognitiveServices.ResourceProvider.AmlRp.AsyncOperationHelper.PollUntilCompleteAsync[T](TraceContext traceContext, HttpResponseMessage response, HttpClient httpClient, Int32 timeoutInMin, CancellationToken cancellationToken) in /__w/1/s/src/Common/ResourceProvider/AmlRp/AsyncOperationHelper.cs:line 85\n at Microsoft.CognitiveServices.ResourceProvider.AmlRp.AmlRpClient.PutAmlRpVirtualHubAsync(TraceContext traceContext, Dictionary2 headers, ResourceIdentityInArm resourceIdentity, String primaryUserAssignedIdentity, String internalId, KeyVaultProperties keyVaultProperties, String subscriptionId, String resourceGroupName, String workspaceName, List1 networkInjections, PublicNetworkAccessType publicNetworkAccessType, CancellationToken cancellationToken) in /__w/1/s/src/Common/ResourceProvider/AmlRp/AmlRpClient.cs:line 119\n at Microsoft.CognitiveServices.ResourceProvider.AmlRp.AmlRpService.PutAmlRpWorkspaceAsync(TraceContext traceContext, ResourceRequestContext requestContext, WorkerMessageRequestContext workerMessageRequestContext, IResourceEntity insertedResourceEntity, CancellationToken cancellationToken) in /__w/1/s/src/Common/ResourceProvider/AmlRp/AmlRpService.cs:line 124\n at Microsoft.CognitiveServices.ResourceProvider.Worker.MessageProcessor.ProcessInternalAsync(TraceContext traceContext, RpWorkerQueueMessage message, CancellationToken cancellationToken) in /__w/1/s/src/ResourceProvider/Rp.WorkerRole/AccountProvisioning/MessageProcessor.cs:line 297" } ] } ] } ] }