Getting into the HLL building isn't critical to the game. You learn a little about Marten and have a chance to loot the lockers, that's all. It's odd that the scanner stopped working though.
Later on, you'll be able to enter the Mook compound with your entire party. If you've been all over Arnika (up top and down below), then the next stop is usually Trynton.
Nightowl2
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