What a shame! If you feel like giving it another try, Shari's house is in the southeast corner of the map. She's inside her house, so you just interact with the house directly. The Mayor usually gives the most helpful hints of where to find everyone.
This was a pretty big project for us (there's more than there appears at first), so we stretched ourselves pretty thin and I think we dropped the ball on clarity in some places. That's why I'm thankful for your feedback!