Activate Touch ID doesn't work on Mac STUDIO

Cable the Touch ID enabled Apple Keyboard using the suppled Apple Cable >> Directly to the computer.

Make sure the Power Switch on the leading edge of the Keyboard is switched to ON.

Does the Touch ID in System Setting work ?

If not, switch OFF the keyboard and pause 5 seconds.

Switch the keyboard ON again

Then have a few suggestions ;

.Start now and open an Apple Support Ticket as they are PAID  Apple Employees to deal will these types of issues . 

 Product Feedback - Apple and make it known to Apple regarding this ongoing issue 

Have the computer, keyboard evaluated by the Professionals who have the Special Hardware Software and Expertise to diagnose the issue and offer possible solutions

Make an Appointment at the Apple Genius Bar or call 1 800 MyApple and have them evaluate the computer / keyboard

 Contact Apple for support and service