Normally after you buy a season, you can replay the story in the archive, but the latest chapter, the Poisoned Sea, Season 2.4 doesn’t have a replay option. It just says story complete, which is clearly a bug. I’ve included two screenshots. One of the bugged Poisoned Sea chapter and one of Dark Path Travelled, showing what the story screen should look like with the replay arrow on the upper right side of the screen.
Sorry about this! I’ve reported it to the team and we’ll let you know when there’s any info.