What is the exact version of Lightroom installed on your computer?
Does none of the slider in develop module work?
The version of my Lightroom software is 5.7.1. None of the develop sliders work.
That worked, thanks. I would like to know why that worked, is it something I did while using Lightroom?
Great, glad you are able to work.
No, you did not do anything wrong in Lightroom, it might be the preferences got corrupted.