Azure Function with HTTP Trigger and Blob Input Binding – can't read JSON files that are in a folder. Possible blob file path error?

I am using an Azure Function that has a HTTP trigger with a route parameter {id} which is the fileId of the JSON file I want to read.
I am using a Blob Input Binding to bind where my JSON files are stored. The JSON files are stored in a container called "conversations" and then in a folder called "Conversation".
An example of a file route is "https://<STORAGE_ACCOUNT_NAME>/conversations/Conversation/8da3d7ad3e35273-1aWpKU4rVghHiTaYkjOjVC-eu%7C0000000.json"

Below is my code.

public static class GetConvo
    {
        [FunctionName("GetConvo")]
        public static async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = "getConvo/{id}")] HttpRequest req,
            [Blob("conversations/{id}", FileAccess.Read, Connection = "AzureWebJobsStorage")] string json,
            ILogger log, string id)

        {
            
            log.LogInformation($"File name: {id}");

            if (json == null)
            {
                log.LogInformation($"File {id} not found");
                return new NotFoundResult();
            }
            else
            {
                log.LogInformation($"Content: {json}");
            }


            return new OkObjectResult(JsonConvert.DeserializeObject<Message>(json));

The above code works if I move a JSON file to outside the "Conversation" folder, I can access it and receive a 200OK code.

I have tried changing the Blob input binding path to "conversations/Conversation/{id}" as below but that returns a 404 code.

[FunctionName("GetConvo")]
        public static async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = "getConvo/{id}")] HttpRequest req,
            [Blob("conversations/Conversation/{id}", FileAccess.Read, Connection = "AzureWebJobsStorage")] string json,
            ILogger log, string id)

Is this a blob input path problem?

How would I read JSON files that are in a folder in a blob container using an azure function?