404 error when installing extension

Hello.

I'm trying to setup a small proof of concept using code-marketplace to distribute extensions on a corporate environment.

On a windows box, I was able to get the code-marketplace server up and running behin an nginx proxy for ssl termination, and by editing the product.json file in the vs code install dir I'm able to list the custom extensions on the extensions tab.

However, when I click on install, I get a XHR error and a message to try to download the extension manually. When I choose that option, my browser opens up to a 404 page on an address that looks like this https://mydomain.com/api/publishers/undefined/vsextensions/test-extension/0.0.1/vspackage.

Has anyone run into this sort of issue?

Best regards,
Carlos Jourdan