Hi Thomas,
The extension will work with OpenID. I've been using the OpenID
feature for a few months now. If memory serves, when you switch to an
OpenID type login, a new API key is generated. Can you check your API
key in your Backpack account page and use the new key in the extension
options? Please let me know if this works.
I know it might make sense that the extension options would ask for
your OpenID, but that's not how the Backpack API works. You still
need to provide your user name and API key.
Thanks,
Ben