I had to change some lights on a living room light fixture a few weeks ago and got the cover off with no issue and changed the bulbs. The issue occurred when I tried to put the cover back on, the central thread came off somehow and I can't get it to screw back in.
I dug around in it today (after turning the breaker off), taking off both screws either side of the central hole but was unable to remove the fixture entirely. I'm assuming the nut that holds the central screw is just loose somewhere up there, but I'm not sure since I wasn't the person who originally installed the fixture.
What steps am I looking at to get this fixed?