I can no longer see what I am doing with masking, but if I adjust the settings, they show up when I click okay. I am pretty much guessing at masking. High quality preview is selected. Nothing happens when I select any of the sliders within the preview. I tried both content & object aware. This was buggy in a previous version, seemed like it was fixed and now is back to buggy.
Let's make sure we're in a default state and there are no stale setting somewhere: Restore your preferences using this manual method: https://helpx.adobe.com/photoshop/using/preferences.html#Manually Does it work correctly? If that doesn't solve it, you can quit Photoshop and put the Settings folder back. If it does solve the problem, I would like to get the folder of settings to try and figure out what is bad with them.
Senior Product Manager - Customer Advocacy - Digital Imaging