Some updates:
I tried running the task via command line from the cluster itself (logged into the head node under an admin account) and got the same results. I then tried submitting a job through the GUI, and a window pops up that says "please wait for validation" and
is hanging there.
EDIT: I tried shutting the HPCScheduler Service off (to restart it), but get the following error: "Error 1061: The service cannot accept control messages at this time."