UI not working

am having a problem with the UI buttons, I am using a Linux OS and Unity 2020.1, My problem is that I can not click the UI buttons, it doesn’t even highlight. I have an Event System, nothing is on top of the UI button and my script is correct. Any suggestions?

6068070–657561–PauseMenu.cs (842 Bytes)

Has your Canvas a “Graphics Raycaster” attached?
Does your Button have an Image (or another component which derives from Graphic) and is Raycast Target checked there?