A couple of things for it to work are that you need to have movement left so it will not work on a base. For closing a warp point you need to be on the warp point. Also there is a supply requirement that supposedly works now. Before it did not use supplies. This stellar manuip use 1000 or 3000 or 4000 a shot.
I have not tried since that has come out so I can not verify it.
Now if it is like combat you can fire just the same with or without supplies. However this may not be the same outside of combat and you may need the supplies to do it with.
Perhaps it is a case that a normal ship with 6 engines has 3000 supplies. your closer needs 3000 supplies, but you used some on the trip to the warp point. You probably need to resupply this ship back up to the 3000 level somehow.
Can someone else confirm if I am even close on this
