400 Error when downloading vsphere-dummy box

[cofonseca]

I am trying to download the vsphere-dummy box from Vagrant Cloud: https://app.vagrantup.com/ssx/boxes/vsphere-dummy

If I run vagrant up, I receive the following error:

There was an error while downloading the metadata for this box.
The error message is shown below:

The requested URL returned error: 400

If I try to download the box directly from the Vagrant Cloud website (https://app.vagrantup.com/ssx/boxes/vsphere-dummy/versions/0.0.1/providers/vsphere.box), I get a 400 error from Dropbox:

Error (400)
Something went wrong. Don't worry, your files are still safe and the Dropbox team has been notified. Check out our Status Page to see if there is a known incident, our Help Center and forums for help, or head back to home.

I do not receive these errors when downloading other boxes. Any suggestions? Thanks!