Found a bug in the mod's script file UpdateScript0.09-3.rpy when trying to meet Syd in the yard in the early morning. It appears that the variable was highlighted when using shift-O to use console mode in the game, overwriting the actual variable (playing_with_sid_yard):
if O >= 1: (O should be: playing_with_sid_yard)
scene bg SleepBlack
with fade
scene bg YardSidneyMorning01
with fade
RT "{i}Damn, my sister is so sexy.{/i}"
RT "{i}I know she's expecting me to join her. She was pretty clear she wants to try fucking, while Mom makes us breakfast again.{/i}"
RT "{i}But we'll get caught for sure without something to drown out all the noise Sidney makes.{/i}"
RT "{i}If I can get Mom to start listening to music when she cooks again. That might cover up all the noise Sidney makes.{/i}"
if inventory.inv_amount(radio) <= 1:
RT "{i}I wonder if there's anything for sale online I could give Mom as a gift...{/i}"
scene bg SleepBlack
with fade