BUILD SOS! Can't Click Second Floor

Where are my builders at??? Hi! Please help me with this issue I've had for days now.

For some reason the second floor of my remodel is disabled? "Go Here" doesn't appear when I click on it. I've tried deleting the stairs, using ladders, rebuilding the walls/floors/ceilings. Nothing is working and I don't understand. I even tried moving the stairs to a completely different location. 

PLEASE HELP

Saved in Gallery as: Orchid A Jojo

Pics of the 1st & 2nd floor: