I was able to fix this by recreating an older Ubuntu file “69-xserver-xorg-input-wacom.rules” in “/lib/udev/rules.d/69-wacom.rules/” thanks to Phi at AskUbuntu.com
The stylus pen and eraser are detected in the xinput list and both have pressure sensitivity.
The code is posted in this response and is also found in older Ubuntu/Lubuntu versions.