Macbook trackpad lower corner clicks not working
We have 2 identical Macbooks (Retina, 12", Early 2015). On one, the lower corner clicks worked correctly and on the other, no response. In researching, I saw something about the 'secondary click' having to be turned on in Preferences under Trackpad. I did this to the one that was working correctly and the clicks stopped working. I turned it off and it did not go back to working again, even after a reboot.
MacBook, macOS 10.14