Alt-click the eye icon layer not working on Windows

it is happened to me few months ago, i accidentaly pressing "Q" which is a shortcut for quick mask mode. maybe you did it too. i realized in the project tab showing something difference as attached image and the selected layer in layer panel is marked as red (normally its light grey) and in quick mask the alt+click wont work.

Try to pressing Q again, and see if it work.