Fatal error: Uncaught Error: Call to undefined function wp() in C:\xampp\websitesdomains\wordpress_doktor_fisip\wp-blog-header.php:16 Stack trace: #0 C:\xampp\websitesdomains\wordpress_doktor_fisip\wp-load.php(17): require() #1 C:\xampp\websitesdomains\wordpress_doktor_fisip\index.php(27): include('C:\\xampp\\websit...') #2 {main} thrown in C:\xampp\websitesdomains\wordpress_doktor_fisip\wp-blog-header.php on line 16