Yeah, it's because you somehow managed to get Lucy's affection beyond 15 without transforming her. How? I have no clue, but until I find out you can type lucy_aff=15 in the console (SHIFT+O) and move on from there. I'm working on a fix.
Edit : Found the issue but anyone that reached this bug needs to use the console or restart. If you don't know how go inside the mynewneighbors/renpy/common look for the file console.rpy and open in notepad . Press Ctrl+f and locate config.console=False. Change it to True (capital T) and then press Shift+O in the game and type lucy_aff=15 . Don't forget to backup your original file.
Option 3: Copy this file inside mynewneighbors/game but I can't be 100% sure it won't cause some other bugs (but it's extremely unlikely.) Delete the numbers from the name the name should be only kitchen.rpy
View attachment 762181