Assume this is sth I need to contact my host for, but they are so cr@ppy, I thought I'd first ask.

Code is working fine on my local maching, but when running it on my server, I get an error that read:
Fatal error: Class 'mysqli' not found in /home/httpd/html/www.mysite.com/src/lib/dbconnect.php on line 289
That line of code:
$this->MySQLi = new mysqli($servername, $username, $password, $database);