I have simple tag which tracks how many times an image was clicked. I use Click Classes inside the trigger and I have selected the image class name but it doesn't track anything and I don't know why. My Click Classes variable is enabled. The image appears few seconds after everything on the page is loaded, could that be the reason why it is not tracked? This is the guide I followed - https://pilotdigital.com/blog/how-to-track-clicks-with-google-tag-manager/
After doing all this debugging you should be a step closer to why it's not firing as you expect.