Fatal error: Uncaught Error: Call to a member function insert() on null in /home/.sites/133/site516/web/WP/wp-content/plugins/sitepress-multilingual-cms/inc/upgrade-functions/upgrade-2.9.php:14
Stack trace:
#0 {main}
  thrown in /home/.sites/133/site516/web/WP/wp-content/plugins/sitepress-multilingual-cms/inc/upgrade-functions/upgrade-2.9.php on line 14