Lin advises her to stop, but being a teenager, Quinn doesn't listen.
No good will come of this.
CW: jump scares
This franchise prequel is much better than expected for unexpected reasons.
The first two are part of the whole jump scare haunting genre and this sucks a bit at that. The scares are weak, reliant on loud noises and we've seen all that before.
What it serves as is an origin story for the unlikely collaboration between Elise (elderly but serious and committed medium) and Specs & Tucker (young, bickering tech heavy YouTuber "ghostbusters") and it works great as that.
The early sections where Quinn is the protagonist get you invested in saving Quinn from the malign influence she has attracted. Then it swaps to Elise as protagonist who has been a likeable character from the outset and rounds out her and the two guys. There's an element of this protagonist swap in the previous movies but here it's very noticeable.
It has real punch in being about Elise having to make hard choices to save Quinn and deal with her own grief rather than just scaring the viewer. Although it still tries a fair bit of that.
Overall 7/10, not a good horror but buoyed up by being much better at the character work than the previous movies needed to be. I can see why this will have disappointed horror fans while not finding an audience elsewhere.