Flex Consumption Plan: The specified taskhub does not exist (TaskHub=XXX, StorageConnectionName=AzureWebJobsStorage.")

I have created and deployed Durable Function App that uses Netherite, but can't start an orchestration.

Error:

Status(StatusCode="Internal", Detail="Failed to start instance with ID c2f8ebaa996847f7816e480d0c63464e.
Inner Exception message: The specified taskhub does not exist (TaskHub=XXX, StorageConnectionName=AzureWebJobsStorage.")

StackTrace:

[
    {
        "severityLevel": "Error",
        "outerId": "0",
        "message": "Status(StatusCode=\"Internal\", Detail=\"Failed to start instance with ID af81b4b4895b4304b283bcb99559bd69.\nInner Exception message: The specified taskhub does not exist (TaskHub=XXX, StorageConnectionName=AzureWebJobsStorage.\")",
        "type": "Grpc.Core.RpcException",
        "id": "15915024",
        "parsedStack": [
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw",
                "level": 0,
                "line": 0
            },
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess",
                "level": 1,
                "line": 0
            },
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification",
                "level": 2,
                "line": 0
            },
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.CompilerServices.TaskAwaiter`1.GetResult",
                "level": 3,
                "line": 0
            },
            {
                "assembly": "Microsoft.DurableTask.Client.Grpc, Version=1.2.4.0, Culture=neutral, PublicKeyToken=6a4c0315c2d1d937",
                "method": "Microsoft.DurableTask.Client.Grpc.GrpcDurableTaskClient+<ScheduleNewOrchestrationInstanceAsync>d__12.MoveNext",
                "level": 4,
                "line": 0
            },
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw",
                "level": 5,
                "line": 0
            },
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess",
                "level": 6,
                "line": 0
            },
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification",
                "level": 7,
                "line": 0
            },
            {
                "assembly": "System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e",
                "method": "System.Runtime.CompilerServices.TaskAwaiter`1.GetResult",
                "level": 8,
                "line": 0
            },
            {
                "assembly": "YYY, Version=2.3.0.13281, Culture=neutral, PublicKeyToken=null",
                "method": "YYY.HttpStartFunction+<Run>d__4.MoveNext",
                "level": 9,
                "line": 64,
                "fileName": "D:\\a\\1\\s\\src\\YYY\\HttpStartFunction.cs"
            }
        ]
    }
]

Netherite exception:

Failed to start instanceId c2f8ebaa996847f7816e480d0c63464e due to internal exception.
Exception trace: DurableTask.Netherite.NetheriteConfigurationException: The specified taskhub does not exist (TaskHub=XXX, StorageConnectionName=AzureWebJobsStorage
at DurableTask.Netherite.Faster.FasterStorageLayer.DurableTask.Netherite.IStorageLayer.TryLoadTaskhubAsync(Boolean throwIfNotFound) in /_/src/DurableTask.Netherite/StorageLayer/Faster/FasterStorageProvider.cs:line 116
at DurableTask.Netherite.EventHubsTransport.EventHubsTransport.DurableTask.Netherite.ITransportLayer.StartAsync() in /_/src/DurableTask.Netherite/TransportLayer/EventHubs/EventHubsTransport.cs:line 93
at DurableTask.Netherite.NetheriteOrchestrationService.StartClientAsync() in /_/src/DurableTask.Netherite/OrchestrationService/NetheriteOrchestrationService.cs:line 415
at DurableTask.Netherite.NetheriteOrchestrationService.<>c__DisplayClass92_0`1.<<TryTransition>g__conditionalTransition|0>d.MoveNext() in /_/src/DurableTask.Netherite/OrchestrationService/NetheriteOrchestrationService.cs:line 387
--- End of stack trace from previous location ---
at DurableTask.Netherite.NetheriteOrchestrationService.TryStartAsync(Boolean clientOnly) in /_/src/DurableTask.Netherite/OrchestrationService/NetheriteOrchestrationService.cs:line 344
at DurableTask.Netherite.NetheriteOrchestrationService.GetClientAsync() in /_/src/DurableTask.Netherite/OrchestrationService/NetheriteOrchestrationService.cs:line 74
at DurableTask.Netherite.NetheriteOrchestrationService.DurableTask.Core.IOrchestrationServiceClient.CreateTaskOrchestrationAsync(TaskMessage creationMessage, OrchestrationStatus[] dedupeStatuses) in /_/src/DurableTask.Netherite/OrchestrationService/NetheriteOrchestrationService.cs:line 656
at DurableTask.Core.TaskHubClient.InternalCreateOrchestrationInstanceWithRaisedEventAsync(String orchestrationName, String orchestrationVersion, String orchestrationInstanceId, Object orchestrationInput, IDictionary`2 orchestrationTags, OrchestrationStatus[] dedupeStatuses, String eventName, Object eventData, Nullable`1 startAt) in /_/src/DurableTask.Core/TaskHubClient.cs:line 645
at Microsoft.Azure.WebJobs.Extensions.DurableTask.DurableClient.Microsoft.Azure.WebJobs.Extensions.DurableTask.IDurableOrchestrationClient.StartNewAsync[T](String orchestratorFunctionName, String instanceId, T input) in D:\a\_work\1\s\src\WebJobs.Extensions.DurableTask\ContextImplementations\DurableClient.cs:line 215
at Microsoft.Azure.WebJobs.Extensions.DurableTask.LocalGrpcListener.TaskHubGrpcServer.StartInstance(CreateInstanceRequest request, ServerCallContext context) in D:\a\_work\1\s\src\WebJobs.Extensions.DurableTask\LocalGrpcListener.cs:line 158.. InstanceId: c2f8ebaa996847f7816e480d0c63464e. Function: MainOrchestrator. HubName: XXX. AppName: XXX. SlotName: Production. ExtensionVersion: 2.13.5. SequenceNumber: 2.

Deployed using AzureFunctionApp@2 - Azure Functions Deploy v2 task

- task: AzureFunctionApp@2
  displayName: 'Deploy to Flex Consumption Function App'
  inputs:
    azureSubscription: '$(azureSubscription)'
    appType: 'functionAppLinux' 
    isFlexConsumption: true
    appName: '$(appName)'
    package: '$(Build.ArtifactStagingDirectory)/$(buildVersion).zip'
    #appSettings: # string. App settings. 
    deploymentMethod: 'auto'

Function App is showing the list of functions.

Function app contains all the required app settings,

[
  {
    "name": "AzureFunctionsJobHost__extensions__durableTask__storageProvider__eventHubsConnectionName",
    "value": "EventHubsConnection",
    "slotSetting": false
  },
  {
    "name": "AzureFunctionsJobHost__extensions__durableTask__storageProvider__LoadInformationAzureTableName",
    "value": "DurableTaskPartitions",
    "slotSetting": false
  },
  {
    "name": "AzureFunctionsJobHost__extensions__durableTask__storageProvider__PartitionCount",
    "value": "12",
    "slotSetting": false
  },
  {
    "name": "AzureFunctionsJobHost__extensions__durableTask__storageProvider__storageConnectionName",
    "value": "AzureWebJobsStorage",
    "slotSetting": false
  },
  {
    "name": "AzureFunctionsJobHost__extensions__durableTask__storageProvider__type",
    "value": "Netherite",
    "slotSetting": false
  },
  {
    "name": "AzureWebJobsStorage",
    "value": "<AzureWebJobsStorage>",
    "slotSetting": false
  },
  {
    "name": "DEPLOYMENT_STORAGE_CONNECTION_STRING",
    "value": "<DEPLOYMENT_STORAGE_CONNECTION_STRING>",
    "slotSetting": false
  },
  {
    "name": "EventHubsConnection",
    "value": "<EventHubsConnection>",
    "slotSetting": false
  },
  {
    "name": "FUNCTIONS_EXTENSION_VERSION",
    "value": "~4",
    "slotSetting": false
  }
]

In the Storage Account container for Task Hub and DurableTaskPartitions is missing:

Start by reviewing the configuration and the stack-trace locations in FasterStorageProvider.cs, EventHubsTransport.cs, and NetheriteOrchestrationService.cs. Reproduce the Flex Consumption deployment with the shown app settings and determine why the task hub is not created or found; done means the task hub and DurableTaskPartitions storage exist and the orchestration starts successfully.