HRESULT 0x80072EE4 when using BackgroundDownloader

Every time when I call CreateDownload on a BackgroundDownloader in my C# code for a Windows Store application, I get the following exception: Exception from HRESULT: 0x80072EE4. I have declared all necessary capabilities in my package file.

Example This code breaks when CreateDownload() is called:

public static async void DownloadFile(string url){
    var uri = new Uri(url, UriKind.Absolute);            
    FileSavePicker openPicker = new FileSavePicker();
    openPicker.SuggestedStartLocation = PickerLocationId.VideosLibrary;            
    openPicker.FileTypeChoices.Add("Video file", new List<string>() { ".mp4" }); 
    StorageFile file = await openPicker.PickSaveFileAsync();
    if (file != null)
    {
        DownloadOperation downloader = new BackgroundDownloader().CreateDownload(uri, file); //BREAKS HERE            
        //... (rest of code)
    }
}

Exception This is the exact exception I get:

System.Exception was unhandled by user code
  HResult=-2147012892
  Message=Exception from HRESULT: 0x80072EE4
  Source=Windows.Networking
  StackTrace:
   at Windows.Networking.BackgroundTransfer.BackgroundDownloader.CreateDownload(Uri uri, IStorageFile resultFile)
       at Example.BlankPage1.<DownloadFile>d__1.MoveNext()
  InnerException: 

When I try to run the Windows 8.1 Background Transfer sample, I get the same exception at the same method.

When Googling on 0x80072EE4, it is suggested that moving Temporary Internet Files would solve the issue. In my case, it didn't work.

I know this is an old question, but still, I guess I just found some input for what it's worth.

I was getting the HRESULT: 0x80072EE4 error after removing all permissions for the windows user/account that (I guess) my app is using for writing temp files when using background-downloader (and probably other stuff).

Check the permissions on the "{userAccount}\AppData\Local\Packages{yourAppName}\AC" folder, and specifically the "BackgroundTransferApi" folder in there, and make sure that there is an account named something like "S-1-15-2-.......{veryLongString}" and that it has all the permissions set.

Hope this helps some future visitor :)