[chef] Ohai error when running knife configure

[Peter Loron < >]

I have an Ubuntu 13.10 x64 machine on which I have installed the 
chef_11.12.2-1_amd64.deb package. I have a user created in the Chef 
server, which is an admin. I grabbed that pem file and the validator 
pem. When I run "knife configure -i" on the client, I get this:

ERROR: Ohai::Exceptions::DependencyNotFound: Can not find a plugin for 
dependency os

I can run ohai by itself and get a pile of data back.

Any clues?

Thanks.

-Pete