I can't find it to download anywhere.
Maybe you're having a stroke.
Maybe there is something in modulenotfound "canio" - Google Search that can help you on the way.
As this seems to be a programming problem, your topic has been moved accordingly,
Are you using Python on an Arduino? Like CircuitPython or MicroPython? You should probably seek help at the site for your flavor of python.
Thank you
I just realized that there are two kinds.