Greyed out slider on presentation canvas

I have a presentation canvas with a variety of sliders to move variables.  When I added another slider into a group and connected it to it’s variable it shows the proper data.  However, I am unable to actually move the slider and it is greyed out.  I have deleted it and remade it several times but it remains greyed out and does not function properly.  All the properties are the same as the other sliders that are near it.