I get an error - The product activation key you have entered is not a local Computer Locked license product activation key - why?

Last updated April 1, 2020 by Tekla Structural Designer Global Support tekla.structuraldesigner.ghd@trimble.com

I get an error - The product activation key you have entered is not a local Computer Locked license product activation key - why?

I am trying to activate my product activation key (PAK) but I am getting the following error. Why is this?

The product activation key you have entered is not a local Computer Locked license product activation key