I think that the Coven is going to repeat episode 5 and the key to fixing things will be succeeding in Lilia's trial:
Things are wrong from the get go. Lilia has knowledge she shouldn't have.
Lilia wakes up and immediately knows they're in danger. Prodded by Rio to explicitly name who is after them, she says it's the Salem Seven.
Except in episode 2 and thus episodes 3 and 4 as well, Lilia doesn't know it's the Salem Seven after them. She says "well, whatever chased Agatha down here, it's our problem now". She didn't sense the Seven attacking Agatha's house in episode 2, or that the crow witch was outside her building, and neither Agatha or Teen clarified for the others at that point.
So how and why would she know it's the Seven now?
She certainly isn't guessing.
She isn't divining it; there's no actual prediction, no tarot call outs, she doesn't say anything outright out of sync and she isn't spaced out like she usually is when her psychic abilities manifest. She knows exactly what is going on in that moment. This is not being shown as knowledge coming to her from elsewhere, this is information she consciously already has.
She just woke up and knew they were in immediate danger.
Almost like it's happened before.
It's established both that time can go weird on the Road and that Lilia has temporal magic
The version of the Ballad that the Coven sings in episode 2: "through many miles/of tricks and trials".
Lorna Wu's version of the Ballad: "the Road is wild and wicked/winding out of time".
Lilia says about her own abilities in this episode that she reads people and she reads time.
Everything about the trial is wrong and everything goes wrong inside it.
They fly through the bug witch with Agatha still having a bug in her hair in the Cabin, which would point to the entire thing being a trap by the Salem Seven.
We don't see the moon phase on the door to confirm who it really belongs to. The door doesn't lose its handles: they aren't trapped in like previous trials.
Aspect ratio doesn't change like with previous trials.
The trial itself makes no sense, aesthetically it doesn't match Agatha, it doesn't have a logical way for her to use her knowledge/power to overcome it, and it directly seeks to split the Coven apart where every previous trial is about them having to work together.
They climb up out of the cabin, not "down, down, down the Road" like with previous trials.
They break every rule given to them in the Cabin.
The ouija board jumps at them whereas every previous trial had them stumble on clues they had to decipher.
They fail the trial. Alice dies, they choose to abandon Agatha instead of helping her overcome her trauma, they're completely fractured as a coven, they didn't use their knowledge/power.
Almost as if none of this should have happened.
Lilia's premonitions seems heavily focused on events in episode 5, she is repeatedly singled out as acting strange by the others in this episode
People have already worked out that it's likely "Try to save Agatha" from episode 3 and "Alice don't" from episode 4 were supposed to be said together in episode 5 as "Alice, don't try to save Agatha".
Lilia also says that "[she] hated this the first time" during the episode. To which Teen then says "Lilia's acting weird again", which is practically a neon sign that Lilia's words aren't benign.
Then, after Everything, she says "death comes for us all" in an almost resigned, mournful way that doesn't track with her previous reactions to danger and coven members dying. And Agatha specifically clocks this, she look thoughtful, like she just got given a missing puzzle piece.
Lilia was terrified by her hallucinations in episode 3, angry and upset about Sharon in episode 4, she repeatedly shows a lot of empathy towards Alice specifically, and yet we're lead to believe she just accepts that Alice is dead and moves on? No.
If Lilia is this resigned to the death of a coven member it's because she's either literally not herself via some kind of possession or because she is stuck in a loop trying and failing to prevent tragedy.
But she can't do it alone.
Lilia's trial will involve course correcting the Coven's mistakes in episode 5.
In the trailer for the show we see a scene of Lilia's trial. It clearly confronts witch stereotypes, outfitting her as Glinda the Good Witch. It also clearly involves the Salem Seven in some way. She is actually shown floating/falling with them in a room with swords standing blade up beneath them. (This is definitely reaching now but the saying 'to fall on your sword' comes to mind, meaning to sacrifice yourself for something.)
In episode 2, she tells Agatha that she doesn't miss the glory days because she was chased from every village she passed through due to accurately predicting tragedy. I posit that Lilia's trial is about her overcoming her fear of her psychic magic and resentment of witch stereotypes and the heartache and loneliness this has caused her by fixing the timeline. She has to figure out how to actively control her magic to get her predictions to the right times, and the rest of the Coven has to believe her.
It's a trust fall, literally. She might have to sacrifice herself, in hopes that eventually she'll get her outbursts to the right times and be able to keep the Coven safe and whole long enough for them to save her at the end by working together to defeat the Seven. Allowing them to complete the Road "Coven true".
Agatha will be the one to help Lilia trust herself, as she did with Jen and Alice in previous trials, she is cast as the Wicked Witch to Lilia's Glinda meaning a central aspect of the trial will be their relationship. The Coven must trust each other, they have to look beyond stereotypes and let go of their preconceived notions about each other. She might be the first one, with Rio, to piece together what's happening and believe Lilia.