Fatal error: Call to undefined function is_blog_installed() in /homepages/13/d486352582/htdocs/wordpress/wp-includes/load.php on line 545

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'wp_ob_end_flush_all' not found or invalid function name in /homepages/13/d486352582/htdocs/wordpress/wp-includes/class-wp-hook.php on line 286