I am also having this issue on my mesmer only. All other characters have been able to open the story journal without an issue. I tried repairing and deleting the cache, neither of these steps resolved it.
My mes is on the beginning of today’s episode Tangled Paths. My ele is also on this same spot yet does not crash, my necro has completed it and can open the journal without any problems. Necro and ele can both start the episode with any trouble.
Mesmer is my only character on “Victory or Death”.