Polaris P945 Pool Robot -- Error Code 10 (ER-10) -- hair in the machine

How I resolved an "ER-10" code on my Polaris P945 pool cleaning robot. Likely will work for many other Polaris models which have very similar technology within.
Big Thank You to ‪@MarktheHost‬ for the two videos that guided me (and instilled confidence I wasn't about to blow up my machine or anything):
• Polaris P965IQ 9550 "E...
• Polaris P965IQ Disasse...
SPOILER for those who are impatient: there was a build up of hair wrapped around the propeller shaft inside my robot's case. Opening it up, taking the cover off, cleaning out the hair, and putting it all back together took me about 7 minutes....once I had watched Mark's videos 😁