Fatal error: Uncaught Error: Call to undefined function wp_get_server_protocol() in /var/www/html/wp-includes/functions.php:1456 Stack trace: #0 /var/www/html/wp-includes/class-wp.php(762): status_header(200) #1 /var/www/html/wp-includes/class-wp.php(784): WP->handle_404() #2 /var/www/html/wp-includes/functions.php(1334): WP->main('') #3 /var/www/html/wp-blog-header.php(16): wp() #4 /var/www/html/index.php(17): require('/var/www/html/w...') #5 {main} thrown in /var/www/html/wp-includes/functions.php on line 1456