Basically, I was exploring, decided to go into the Frontier Caverns, made it to Proving Grounds, and killed the armored Cyclopes. And now, I can't proceed. It says 'Enemies.. They're close.' despite everything being dead. Is there a possible solution for me? My entire team is level 27, and I play as an Assassain. Gracias, friends.

EDIT: I am using the PS3, and my online ID is ZaMbIeSdIeNoW21 (zambiesdienow21 captoggle) if you wish to use my main pawn. I am a low level, yes, but he makes up for it! Most updated version, no DLC downloaded.