Hmm... I honestly wasn't expecting that.
I just downloaded the demo from itch.io myself and tested it, and it worked correctly on my end.
The last thing I can think of is that one of the dream quizzes was answered incorrectly. If even one answer is wrong, Rena's scene won't unlock.
Here are the correct answers:
Pitoo • You're afraid of failing in front of others • Because you want to protect those you care about • You like listening to quiet music • You'd want to be less stubborn • You imagine peace and quiet
Louna • Crimson Strings • It reveals emotions • To escape loneliness • Being forgotten • You hitting the right notes
Rouje • Power and control • Fear of betrayal • Dancing alone • Be less guarded • To be understood
Frenna • Pineapple • The constant chatter about... us • Somewhere warm and cozy • A fire-breathing dragon • Ruling a kingdom of fire
If it still doesn't work after that, we could chat on discord and figure it out together.