尝试访问Azure Function时出错

<ApiErrorModel xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Microsoft.Azure.WebJobs.Script.WebHost.Models">
<Arguments xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" i:nil="true"/>
<ErrorCode>0</ErrorCode>
<ErrorDetails i:nil="true"/>
<Id>91fab400-3447-4913-878f-715d9d4ab46b</Id>
<Message>
An error has occurred. For more information, please check the logs for error ID 91fab400-3447-4913-878f-715d9d4ab46b
</Message>
<RequestId>0fb00298-733d-4d88-9e73-c328d024e1bb</RequestId>
<StatusCode>InternalServerError</StatusCode>
</ApiErrorModel>

public static class Function1
    {
        [FunctionName("HTML2IMG")]
        public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)]HttpRequest req, TraceWriter log)
        {
            string url = req.Query["url"];

            byte[] EncodedData = Convert.FromBase64String(url);
            string DecodedURL = Encoding.UTF8.GetString(EncodedData);

            string requestBody = new StreamReader(req.Body).ReadToEnd();
            dynamic data = JsonConvert.DeserializeObject(requestBody);
            DecodedURL = DecodedURL ?? data?.name;
            var api = new HtmlToPdfOrImage.Api("9123314e-219c-342d-a763-0a3dsdf8ad21", "vmZ31vyg");

            var ApiResult = api.Convert(new Uri($"{DecodedURL}"), new HtmlToPdfOrImage.GenerateSettings() { OutputType = HtmlToPdfOrImage.OutputType.Image });

            string BlobName = Guid.NewGuid().ToString("n");
            string ImageURL = await CreateBlob($"{BlobName}.png", (byte[])ApiResult.model, log);
            var Result = new HttpResponseMessage(HttpStatusCode.OK);
            var oJSON = new { url = ImageURL, hash = BlobName };
            var jsonToReturn = JsonConvert.SerializeObject(oJSON);

            Result.Content = new StringContent(jsonToReturn);
            Result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

            return Result;
        }

        private async static Task<string> CreateBlob(string name, byte[] data, TraceWriter log)
        {
            string accessKey = "xxx";
            string accountName = "xxx";
            string connectionString = "DefaultEndpointsProtocol=https;AccountName=" + accountName + ";AccountKey=" + accessKey + ";EndpointSuffix=core.windows.net";
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
            CloudBlobClient client = storageAccount.CreateCloudBlobClient();
            CloudBlobContainer container = client.GetContainerReference("images");

            await container.CreateIfNotExistsAsync();

            BlobContainerPermissions permissions = await container.GetPermissionsAsync();
            permissions.PublicAccess = BlobContainerPublicAccessType.Container;
            await container.SetPermissionsAsync(permissions);

            CloudBlockBlob blob = container.GetBlockBlobReference(name);
            blob.Properties.ContentType = "image/png";

            using (Stream stream = new MemoryStream(data))
            {
                await blob.UploadFromStreamAsync(stream);
            }

            return blob.Uri.AbsoluteUri;
        }