Inference for custom vision model hosted on Azure Cognitive Services stopped working in December for me - azure

Question

I have a service that has been successfully performing inferences for 2 years, but API stopped working in December. I have created a simple App based on documentation from Microsoft to reproduce the problem. Please see code below.
Is anybody else experience this problem?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Microsoft.Azure.CognitiveServices.Vision.CustomVision.Prediction;
using static System.Net.Mime.MediaTypeNames;
namespace TestCustomVision
{
class Program
{
public static void Main()
{
string imageFilePath = <My Image>;
MakePredictionRequest(imageFilePath).Wait();
Console.WriteLine("\n\nHit ENTER to exit...");
Console.ReadLine();
}
public static async Task MakePredictionRequest(string imageFilePath)
{
var client = new HttpClient();
// Request headers - replace this example key with your valid Prediction-Key.
client.DefaultRequestHeaders.Add("Prediction-Key", <My key>);
// Prediction URL - replace this example URL with your valid Prediction URL.
string url = <Prediction URL>;
HttpResponseMessage response;
// Request body. Try this sample with a locally stored image.
byte[] byteData = GetImageAsByteArray(imageFilePath);
using (var content = new ByteArrayContent(byteData))
{
content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
response = await client.PostAsync(url, content);
Console.WriteLine(await response.Content.ReadAsStringAsync());
}
}
private static byte[] GetImageAsByteArray(string imageFilePath)
{
FileStream fileStream = new FileStream(imageFilePath, FileMode.Open, FileAccess.Read);
BinaryReader binaryReader = new BinaryReader(fileStream);
return binaryReader.ReadBytes((int)fileStream.Length);
}
}
}