A downvote on an answer that is complete is more a call for improvements. Additionally, I suspect there is a philosophy of not indicating
sudo for commands and let the OP figure that extra step from the terminal output.
Sometimes there something odd about how you set the instructions or how the answer layout works. Maybe the OP accepts but the answer has to be understood by anyone.
In your answer, I found that the last note sheds some light on a mistake so you should edit the answer instead next time a note corrects a mistake.
So for that's the point that justifies the downvotes because you in your answer have all the information to do this improvement.
Keep it up! you're almost there if that is the case.
It could be Sudo it could be the Note!! Happy Llamas!