Upon trying to load The Temporal Sanctum - the entry zone, where you’d need to put in a key to enter the dungeon proper - the game freezes, prompting Windows to ask me to wait or end the application.
This has happened trying to load the zone from the waypoint from the End of Time, as well as from trying to access the zone directly from The Ruined Coast.
This has happened on multiple characters; one mage (lvl77), and one Primalist (lvl82).
Repairing the game files seemed to fix it - it found one missing file and reacquired it. I didn’t even know you could do that. Thanks much for your help!