Lesion dataset images not loading through API

[Lythimus]

After following the set up instructions and creating a new lesion dataset with a variety of file formats hoping one will work, when I navigate to Lesion Images, I receive a 400 error when images should load with the following response:

{"message": "TileSourceException: TileSourceException('The large image file for this item is still pending creation.',)", "trace": [["/home/vagrant/env/lib/python2.7/site-packages/girder/api/rest.py", 561, "endpointDecorator", "val = fun(self, args, kwargs)"], ["/home/vagrant/env/lib/python2.7/site-packages/girder/api/rest.py", 1109, "GET", "return self.handleRoute('GET', path, params)"], ["/home/vagrant/env/lib/python2.7/site-packages/girder/api/rest.py", 884, "handleRoute", "val = handler(**kwargs)"], ["/home/vagrant/env/lib/python2.7/site-packages/girder/api/rest.py", 389, "wrapped", "return fun(*args, **kwargs)"], ["/home/vagrant/env/lib/python2.7/site-packages/girder/plugins/isic_archive/server/api/image.py", 251, "thumbnail", "thumbData, thumbMime = ImageItem.getThumbnail(image, width=width)"], ["/home/vagrant/env/lib/python2.7/site-packages/girder/plugins/large_image/server/models/image_item.py", 246, "getThumbnail", "tileSource = self._loadTileSource(item, **kwargs)"], ["/home/vagrant/env/lib/python2.7/site-packages/girder/plugins/large_image/server/models/image_item.py", 163, "_loadTileSource", "raise TileSourceException('The large image file for this item is '"]], "type": "internal"}

I get the following response when clicking one of the images:

{"field": "id", "message": "No such folder: 594d7aead8311358610b67b7", "type": "validation"}

I've waited a few hours in case image processing was done on a cron job / celery job, but nothing happens. Restarting worker or girder does not help either. I tried buliding twice and both times thumbnails were not loading on the Lesion Images page after creating a dataset.