UploadStoryPhotoAsync for stories doesn't seem to work properly

[flug]

I'm trying to get story creation to work using this method

await InstaApi.StoryProcessor.UploadStoryPhotoAsync(image, "someawesomepicture") 

but it doesn't seem to work too well anyway, I get a return message saying "Unknown Server Error", so either I'm doing something that doesn't work, or the method doesn't seem to work any more?