Fatal error: Uncaught ArgumentCountError: Too few arguments to function common_header(), 0 passed in /var/www/html/howto.php on line 5 and exactly 1 expected in /var/www/html/common.php:275 Stack trace: #0 /var/www/html/howto.php(5): common_header() #1 {main} thrown in /var/www/html/common.php on line 275