cannot build the virtual image for beat editor.

I cannot make the VM even after using the june-allies branch.

I installed the packer. The only command I could run is packer not packer-io and when I run packer build ubuntu-18.04-beat.json I get this error:

virtualbox-iso output will be in this color.

==> virtualbox-iso: Downloading or copying Guest additions
    virtualbox-iso: Downloading or copying: file:///usr/share/virtualbox/VBoxGuestAdditions.iso
==> virtualbox-iso: Downloading or copying ISO
    virtualbox-iso: Downloading or copying: file://./iso/ubuntu-18.04-server-amd64.iso
    virtualbox-iso: Error downloading: open /idiap/user/zmostaani/experiments/beat.tutorial/packer_scripts/iso/ubuntu-18.04-server-amd64.iso: no such file or directory
    virtualbox-iso: Downloading or copying: http://cdimage.ubuntu.com/ubuntu/releases/bionic/release/ubuntu-18.04-server-amd64.iso
    virtualbox-iso: Error downloading: Error making HTTP GET request: 404 Not Found
==> virtualbox-iso: ISO download failed.
Build 'virtualbox-iso' errored: ISO download failed.

I followed the steps in the documentation. I am using idiap's workstation which has VirtualBox installed.

It is related to issues #148 (closed) and #150 (closed).