Fatal error: Uncaught Error: Call to undefined function is_blog_installed() in /homepages/33/d301623050/htdocs/German-Blog/wp-includes/load.php:474 Stack trace: #0 /homepages/33/d301623050/htdocs/German-Blog/wp-settings.php(109): wp_not_installed() #1 /homepages/33/d301623050/htdocs/German-Blog/wp-config.php(47): require_once('/homepages/33/d...') #2 /homepages/33/d301623050/htdocs/German-Blog/wp-load.php(37): require_once('/homepages/33/d...') #3 /homepages/33/d301623050/htdocs/German-Blog/wp-blog-header.php(12): require_once('/homepages/33/d...') #4 /homepages/33/d301623050/htdocs/German-Blog/index.php(17): require('/homepages/33/d...') #5 {main} thrown in /homepages/33/d301623050/htdocs/German-Blog/wp-includes/load.php on line 474

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/33/d301623050/htdocs/German-Blog/wp-includes/plugin.php on line 496