Just to jump in here and just give you a idea of the problem
1) Upgrade the plugin (It all looks fine)
2) Looking at the err log
PHP Fatal error: Access to undeclared static property: authorsure::$intro in /nas/wp/www/cluster-1775/markdescande/wp-content/plugins/authorsure/classes/public.php on line 363
Uncheck the ” Show Archive Intro ” would resolve the category and tag problem.
But it would violate with the information provided below the Show Archive Intro.
Russell I have been using this plugin since a long time on many sites,It works like a charm,but please modify the information.