Hi there, thanks for reaching out.
Looks like you put the code in the wrong folder.
It should go in the 'game/bg/bathroom/' folder. Looks like you put it in the 'game/dlc_breemc/bg' folder.
You should just be able to extract the files into the game folder and it should do the folder structure for you.
So it should be: game/bg/bathroom/bathroom.rpy
Give that a go, and let me know if you're still struggling. <3