Accessing HttpContext.Session from static method - asp.net-core

Question

I am getting following error when accessing HttpContext.Session from static method placed in separate task:
Session has not been configured for this application or request.
I used this article to implement access to HttpContext outside the controller
From controller I invoke this static method that used to retrieve image data:
public static void CreateDummyGallery(Gallery gallery)
{
Logger.LogDebug(LogModule.Dummy, $"Starting gallery creation.");
Task.Factory.StartNew(() =>
{
try
{
List<DummyPicture> pictures;
using (var context = new MyzeumContext())
{
int top = 10;
pictures = context.DummyPictures.FromSql($"SELECT * FROM dummypictures ORDER BY RAND() LIMIT {top}").ToList();
}
Logger.LogDebug(LogModule.Dummy, $"Starting retrieving images.");
Parallel.ForEach(pictures, picture => {
using (WebClient client = new WebClient())
{
}
});
Logger.LogDebug(LogModule.Dummy, $"Done retrieving images.");
}
catch(Exception e)
{
Logger.LogError(LogModule.Server, e.Message, e);
}
});
}
The problem occurs in Logger.LogDebug() because this is where I access HttpContext:
public void LogDebug(LogModule module, string message, Exception stackTrace = null)
{
Log record = new Log();
record.Module = module;
record.ThreadId = Environment.CurrentManagedThreadId;
record.SessionId = HttpContextHelper.Current?.Session?.Id;
record.Message = message;
record.Logged = DateTime.UtcNow;
if(stackTrace != null)
{
record.Message += $" :{stackTrace.StackTrace}";
}
queue.Enqueue(record);
}
The problem 99% occurs in the first call inside task:
Logger.LogDebug(LogModule.Dummy, $"Starting retrieving images.");
BUT, right after application starts this whole task block works fine and does not throw any exception. Problem starts after following requests.