Dehaze Slider Lightroom Classic CC

If your Classic is at the latest version (8.1) you probably need to make sure that the image you are trying to edit is at the current process version. Whenever Lightroom adds significant new features, images edited in the older versions typically stay in the older versions of the develop process in order to not have any shifts in the look of the image. However, you can manually shift over the image to the newer development process. Look if there is a tiny lightning bolt on the right bottom side of the histogram in Develop. If so, click it and make it update the current image to the current process version. That should enable the dehaze slider.

thilol26416871  wrote Why do I not have the Dehaze option in Lightroom Classic CC? A friend of mine using a macbook has the dehaze slider...

Either you don't really have Lightroom Classic CC (what is the EXACT version number of your Lightroom?) — or — you are looking in the wrong place. Depending on what version number you have, the dehaze slider is either in the Basic Panel or the Effects panel (or it's not there at all if you don't really have Lightroom Classic CC).