Photoshop Magic Wand Tool: Cannot Adjust Tolerance

[ls3]

When I am using the magic wand tool in Photoshop CC 2019, I cannot adjust the tolerance (the option is completely grayed out, see image below), and I cannot figure out why. Anybody have any clues? 

[Guest]

Hi

Try resetting the tool

If that doesn't help try resetting PS preferences

[ls3]

Thank you! For some reason this issue did not re-occur when I opened PS today...but in the future, if it happens again, I will refer to this.