I am creating an implementation using MediaSavedNotification, in which I need to process the information of a CSV file, which has thousands of records and I am using this interface IBackgroundTaskQueue But I get the following notification Authorization error: Unauthorized access to URL: /umbraco/backoffice/umbracoapi/media/PostSave Contact your administrator for information. The whole process works correctly in the background service. When implementing the non-background processing, this works correctly, but the Media Library stays busy until it finishes processing the whole file. My code is below

public class MediaSavedNotificationHandler(IBackgroundTaskQueue queue, IServiceProvider serviceProvider) 
    : INotificationAsyncHandler<MediaSavedNotification>
{
    public async Task HandleAsync(MediaSavedNotification notification, CancellationToken cancellationToken)
    {
        var mediaItems = notification.SavedEntities;
        foreach (var mediaItem in mediaItems)
        {
            if (mediaItem.Key == MediaNodeIdIdentifiers.MaintenanceProvidersFileNodeId)
            {
                queue.QueueBackgroundWorkItem(async cancellationToken =>
                {
                    using IServiceScope scope = serviceProvider.CreateScope();
                    var maintenanceProviderService = scope.ServiceProvider.GetRequiredService<IMaintenanceProviderService>();
                    await maintenanceProviderService.ImportProviders(mediaItem.Id);
                });
                notification.Messages.Add(new EventMessage("Maintenance Provider Notification",
                    "The Maintenance Providers import process has started and is running in the background.",
                    EventMessageType.Info));
                return;
            }
        }
    }
}