Warning: mysqli_connect(): (HY000/1130): Host '10.27.5.19' is not allowed to connect to this MariaDB server in /customers/8/3/7/dezwaluw.org/httpd.www/header.php on line 7

Fatal error: Uncaught ArgumentCountError: mysqli_error() expects exactly 1 argument, 0 given in /customers/8/3/7/dezwaluw.org/httpd.www/header.php:9
Stack trace:
#0 /customers/8/3/7/dezwaluw.org/httpd.www/header.php(9): mysqli_error()
#1 /customers/8/3/7/dezwaluw.org/httpd.www/fotos/tak.php(66): include('/customers/8/3/...')
#2 /customers/8/3/7/dezwaluw.org/httpd.www/fotos/5 Jongverkenners - Jonggidsen/index.php(2): include('/customers/8/3/...')
#3 {main}
  thrown in /customers/8/3/7/dezwaluw.org/httpd.www/header.php on line 9