Warning: Undefined variable $DB in /mnt/web303/d1/04/510089604/htdocs/ng_MLG/ng_PublicRoot/php/DB_utils.php on line 15

Fatal error: Uncaught TypeError: mysqli_set_charset(): Argument #1 ($mysql) must be of type mysqli, null given in /mnt/web303/d1/04/510089604/htdocs/ng_MLG/ng_PublicRoot/php/DB_utils.php:15
Stack trace:
#0 /mnt/web303/d1/04/510089604/htdocs/ng_MLG/ng_PublicRoot/php/DB_utils.php(15): mysqli_set_charset()
#1 /mnt/web303/d1/04/510089604/htdocs/ng_MLG/ng_PublicRoot/index.php(22): DB_oeffnen()
#2 {main}
  thrown in /mnt/web303/d1/04/510089604/htdocs/ng_MLG/ng_PublicRoot/php/DB_utils.php on line 15