Just leaving this for anyone new starting. The Von bots file that comes with the course files download this page will not work with the new library override function introduced to blender.
If you are using blender 3.0, I would go and download the updated rig in the downloads of the CG cookie site. and replace the Vonbots file in the character folder with the 3.0 version. This rig works with linking and library overrides as it should.
i had a proper brain ache trying to work out how to make the 2.78 version work with the 3.0 blender.
Hopefully this helps someone who is struggling with that
Hey Matt,
The 3.0 versions do come with the downloads on the course. Don't worry, I couldn't figure out how to find all the files either and I had to ask someone. But the 3.0 versions are there...unless they were added between you posting the question and me checking on it.....hmmm.....also a possibility.
Anyway, sorry it gave you a headache. I really wish Blender was as backward compatible as it used to be, but that is the price of such dramatic improvements with each release.