Describe the bug
When working on the public demo of DIVE/VIAME, I tried to download my images. If I clicked on either Everything or Image Sequence I got a very small zip file that was reported as invalid when I tried to open it. The one thing I found that worked to obtain the imagery was selecting multiple datasets and downloading them all at once. I've had this issue across multiple different datasets.

To Reproduce
Steps to reproduce the behavior:

1. Go to a dataset, for example: this public one.
2. Click on Download -> EVERYTHING.
3. Inspect the downloaded zip file. It should be small and invalid.

Expected behavior
I expected to be able to download a valid zip file of imagery or all the contents for the dataset.