Fatal error: Uncaught Error: Call to a member function add_rewrite_tag() on null in /flex/storage/pedone.info/site/www/site/wp-includes/rewrite.php:173 Stack trace: #0 /flex/storage/pedone.info/site/www/site/wp-includes/class-wp-taxonomy.php(405): add_rewrite_tag('%gn-genre%', '([^/]+)', 'gn-genre=') #1 /flex/storage/pedone.info/site/www/site/wp-includes/taxonomy.php(427): WP_Taxonomy->add_rewrite_rules() #2 /flex/storage/pedone.info/site/www/site/wp-content/plugins/xml-sitemap-feed/upgrade.php(96): register_taxonomy('gn-genre', NULL) #3 /flex/storage/pedone.info/site/www/site/wp-content/plugins/xml-sitemap-feed/upgrade.php(13): xmlsf_upgrade('4.7.5') #4 /flex/storage/pedone.info/site/www/site/wp-content/plugins/xml-sitemap-feed/inc/class-xmlsitemapfeed.php(135): require_once('/flex/storage/p...') #5 /flex/storage/pedone.info/site/www/site/wp-content/plugins/xml-sitemap-feed/xml-sitemap.php(92): XMLSF\XMLSitemapFeed->__construct() #6 /flex/storage/pedone.info/site/www/site/wp-includes/class-wp-hook.php(286): xmlsf('') #7 in /flex/storage/pedone.info/site/www/site/wp-includes/rewrite.php on line 173