Brand-new. I completed the Praetorium, got to The Ultimate Weapon, then used Return and logged off. Now, every time I try to complete it again, it brings me to the Praetorium, makes me do it (unskippable cutscenes and all), and when I finish, there's an exit portal. Instead of bringing me to the next boss, it takes me back into the open world again. Am I missing something for how to get to the Ultimate Weapon again? Nevermind, found it:


Not only are the two right on top of each other, it's not labelled Porta Decumana, to match the waypoint, mission, and location name that appears when you enter: