Notice: mysqli_connect(): Setting mysql connection to use "focusing.dk.mysql.service.one.com" in /customers/b/1/e/focusing.dk/httpd.www/cmshtml/library/opendb.php on line 6

Fatal error: Uncaught ArgumentCountError: mysqli_error() expects exactly 1 argument, 0 given in /customers/b/1/e/focusing.dk/httpd.www/index.php:25
Stack trace:
#0 /customers/b/1/e/focusing.dk/httpd.www/index.php(25): mysqli_error()
#1 {main}
  thrown in /customers/b/1/e/focusing.dk/httpd.www/index.php on line 25