Unable to install using Vagrant

Dear Friends ,

I am getting following error while installing erpnext using vagrant

The “metadata.json” file for the box ‘http://build.erpnext.com/ERPNext-Vagrant.box’ was not found.
Boxes require this file in order for Vagrant to determine the
provider it was made for. If you made the box, please add a
“metadata.json” file to it. If someone else made the box, please
notify the box creator that the box is corrupt. Documentation for
box file format can be found at the URL below:

the above error is on Ubuntu 18.04 on Digital Ocean having vagrant installed successfully

I would highly appreciate help from experts to resolve this

Thank You in Advance

FWIW I downloaded and untarred ERPNext-Vagrant.box, and found this:

[clarkej@tango erpnext-vagrant-box]$ tar -xf ERPNext-Vagrant.box
[clarkej@tango erpnext-vagrant-box]$ ls -alh
total 3.9G
drwxrwxr-x. 2 clarkej clarkej 4.0K Dec 22 16:20 .
drwxr-xr-x. 5 clarkej clarkej  12K Dec 22 16:17 ..
-rw-r-----. 1 clarkej clarkej 6.6K Jun 16  2019 box.ovf
-rw-rw----. 1 clarkej clarkej 2.0G Jun 16  2019 ERPNext-Develop-20190616140522-disk001.vmdk
-rw-rw-r--. 1 clarkej clarkej 2.0G Dec 22 15:12 ERPNext-Vagrant.box
-rw-rw-r--. 1 clarkej clarkej   26 Jun 16  2019 metadata.json
-rw-rw-r--. 1 clarkej clarkej 3.4K Jun 16  2019 Vagrantfile
[clarkej@tango erpnext-vagrant-box]$ cat metadata.json 

The docs https://www.vagrantup.com/docs/boxes/format.html and commands like vagrant box outdated https://www.vagrantup.com/docs/cli/box.html may shed on the problem?