Fatal error: Uncaught Error: Call to a member function get() on null in /home/.sites/172/site9208477/web/wp-includes/query.php:28 Stack trace: #0 /home/.sites/172/site9208477/web/wp-content/plugins/liveblog/liveblog.php(447): get_query_var('liveblog') #1 /home/.sites/172/site9208477/web/wp-content/plugins/liveblog/liveblog.php(89): WPCOM_Liveblog::is_entries_ajax_request() #2 /home/.sites/172/site9208477/web/wp-includes/class-wp-hook.php(298): WPCOM_Liveblog::add_custom_post_type_support(Object(WP_Query)) #3 /home/.sites/172/site9208477/web/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters('', Array) #4 /home/.sites/172/site9208477/web/wp-includes/plugin.php(515): WP_Hook->do_action(Array) #5 /home/.sites/172/site9208477/web/wp-includes/class-wp-query.php(1683): do_action_ref_array('pre_get_posts', Array) #6 /home/.sites/172/site9208477/web/wp-includes/class-wp-query.php(3248): WP_Query->get_posts() #7 /home/.sites/172/site9208477/web/wp-includes/post.php(1689): WP_Query->query(Array) #8 /home/.sites/172/site9208 in /home/.sites/172/site9208477/web/wp-includes/query.php on line 28