If you have love for Sidney or Ace, their paths on Day 4 works different unlike the others. Instead of front door, you're gonna get tased and it'll take you to the facility. Just go to the Fire Exit and you should be able to reach Sidney's 2nd Bonus.
alright well so here's the guide for sidney's 2nd bonus
- 1 - N/A
- 2 - Starts at 1, then say “I’m nervous too.” for 2 points, and then “Sorry, I’m not interesting.” for 3 points.
- 3 - N/A
- 4 - Get out of the apartments by the Fire Exit so you’ll be taken to the forest. Then speak with him and say “We took your spot.” for 4 points.
- 5 - Choose to help Sidney for 5 points, and lift the table with him for 6 points. Then help him in silence for 7 points. Go with Sidney and he’ll tell us to hide with Rorik and do as he said. He’ll make a comment and we’ll get 8 points. On the lie game, select “He likes light coffee” for 9 points.
- 6 - When you reach the park, choose Spirits and you’ll get the 10th point.
I possibly reckon you didn't hide with Rorik as he wanted, try that and see if my reckoning was right.