Adding side note about jupyter-role error

[carmat88]

Hey @dwhitena . I'm adding just a simple side note to help non highly skilled users like me to deal with an error when trying this tutorial in a different scenario. Of course if you have any preferences, please feel free to revise what I wrote (and/or its format). Hope this could be helpful for other users experimenting with this very useful step-by-step tutorial. Cheers!