Then you're missing content from the previous update.
- A follow-up event (after recruiting Scarlet) can be triggered in act 2 with an icon that appears at Old Ashton in Begus. It requires the initial events with Citrinne, and the events with training Jiliesh from Millwater. The event will unlock three more new party members, which can be used during the time skip events. Same as Scarlett, they'll disappear when you leave the time skip phase, and re-enter the group when you come back.