I get a similar error when I try to enable the add-on.
this is what pops up when I try to enable.
hi Blender Ratt
Did you ever get this resolved?
Having the same problem using the beta version of blender 2.8
I currently run 3 dual quad core Mac Pro computers, total of 24 cores using OSX Mavericks
I downloaded v2.79b and it happened there as well