On deployment, a function app with a new queue trigger is firing an error that looks like this:

The  MyQueueTrigger  function is in error: Microsoft.Azure.WebJobs.Host: Error indexing method  MyQueueTrigger . Microsoft.Azure.WebJobs.Extensions.Storage.Queues: Storage account connection string  AzureWebJobsAzureStorageConnectionString  does not exist. Make sure that it is a defined App Setting.

In code (C#), this trigger looks like this:

       [FunctionName("MyQueueTrigger")]
        public async Task Run(
                [QueueTrigger(
                    StorageConstants.MyQueue,
                    Connection = StorageConstants.AzureStorageConnectionString
                )]
                string myQueueItem,
                ILogger log)
        {
         ...
        }

The constants described here are literally: "%MyQueue%" and "AzureStorageConnectionString", respectively

Post-deployment, navigating in the Azure portal to this function -> Code + Test shows the following:

{
  "generatedBy": "Microsoft.NET.Sdk.Functions.Generator-4.1.1",
  "configurationSource": "attributes",
  "bindings": [
    {
      "type": "queueTrigger",
      "connection": "AzureStorageConnectionString",
      "queueName": "%MyQueue%",
      "name": "myQueueItem"
    }
  ],
  "disabled": false,
  "scriptFile": "../bin/MyNamespace.Functions.dll",
  "entryPoint": "Redacted"
}

This function gets disabled on deployment/startup after the error above. The phrase "AzureWebJobsAzureStorageConnectionString" does not appear anywhere in my function app, although AzureWebJobsStorage and AzureStorageConnectionString are both required default settings. Where could I look for this concatenated string looking thing?

Adding a configuration with this Name does resolve the issue, but I don t want to commit to doing this ongoing.

Also, this queue trigger works as expected when running locally. local.settings.json looks like this:

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "AzureStorageConnectionString": "DefaultEndpointsProtocol=https;AccountName=redacted;AccountKey=redacted==;EndpointSuffix=core.windows.net",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
    "fooBlobContainer": "foo-blob-container",
    "myQueue":  "my-queue"
  },
  "AppSettings": {
    "KeyVaultSecrets": {
      "KeyVaultName": "https://redacted.vault.azure.net",
      "DataWarehouseConnection": "DataWarehouseConnection",
      "LoggingDBConnectionString": "LoggingDBConnectionString",
      "ClientId": "redacted"
    },
    "myServiceAPI": {
      "BaseURL": "redacted.azurewebsites.net/"
    }
  }
}