Fatal error: Uncaught Error: Call to a member function add_rewrite_tag() on null in /srv/users/serverpilot/apps/petturtlesandmore/public/wp-includes/rewrite.php:172 Stack trace: #0 /srv/users/serverpilot/apps/petturtlesandmore/public/wp-includes/class-wp-taxonomy.php(405): add_rewrite_tag('%category%', '([^/]+)', 'category_name=') #1 /srv/users/serverpilot/apps/petturtlesandmore/public/wp-includes/taxonomy.php(385): WP_Taxonomy->add_rewrite_rules() #2 /srv/users/serverpilot/apps/petturtlesandmore/public/wp-includes/taxonomy.php(72): register_taxonomy('category', 'post', Array) #3 /srv/users/serverpilot/apps/petturtlesandmore/public/wp-settings.php(295): create_initial_taxonomies() #4 /srv/users/serverpilot/apps/petturtlesandmore/public/wp-config.php(99): require_once('/srv/users/serv...') #5 /srv/users/serverpilot/apps/petturtlesandmore/public/wp-load.php(37): require_once('/srv/users/serv...') #6 /srv/users/serverpilot/apps/petturtlesandmore/public/wp-blog-header.php(13): require_once('/srv/users/serv...') #7 /srv/users/ in /srv/users/serverpilot/apps/petturtlesandmore/public/wp-includes/rewrite.php on line 172