Broke off or unscrewed itself and in missing?
Look down the center of the handle. Can you actually see where it is broken off,
or do y0u see the threaded rod where it screws on?
There should be a spring visible if so.
Of it is actually broken off you are pretty much screwed.
You will need to remove the whole assembly and cut the EL off the lower end, then you
should be able to remove what is left from the top end.
Should be a spring and a washer that comes out with the rod.
Is the lock ass'y operable and in the out position?