OK, so I went to the Laurentian system, but could only enter PvE queues for two earlier fleet actions.
I saw three klingon ships running around the area marked "Fleet Action", so I chased them down and was happy to get a "Fleet Action" popup. Great. Unfortunately, every time I tried to enter the actual fleet action, I would warp in to the "Slowing the Expeditionary Force" fleet action zone... then immediately zone back out even if I didn't click on anything.
What's going on here? Am I doing something wrong? Or is this fleet action bugged?