Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /var/www/vhosts/janssen-aggregaten.nl/httpdocs/classes/database/database.class.php:81
Stack trace:
#0 /var/www/vhosts/janssen-aggregaten.nl/httpdocs/includes/settings.inc.php(54): db->__construct(Array, true)
#1 /var/www/vhosts/janssen-aggregaten.nl/httpdocs/index.php(3): require_once('/var/www/vhosts...')
#2 {main}
  thrown in /var/www/vhosts/janssen-aggregaten.nl/httpdocs/classes/database/database.class.php on line 81