I can center the camera on my Sim, and then I can access the upstairs. I didn't build anything or tear anything down. I rearranged furniture and added some more items. I moved the book shelf to the bottom of the stairs, and placed a treadmill at the top of the stairs.
My Sim was sleeping when I entered this. She has a morning routine before I send her to the main living area. There, I will test again, maybe my computer needed to reboot.
Thanks for helping me. I really was at a loss of what to do! I wanted to move my 4-person household to this apartment, trying out city living, and having parties at other places.
My Sim is downstairs in the main living area, and I cannot toggle up to the loft again.
I just noticed the Go Up a Floor - Page Up button is gray, the Go Down a Floor - Page Down is blue.
