Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /var/www/services/QMS/database.php:29 Stack trace: #0 /var/www/services/QMS/database.php(29): mysqli_query() #1 /var/www/services/QMS/general.php(72): database->IP_iuidRecordDatabase() #2 /var/www/services/QMS/add_queue.php(40): general->IP_iuidRecord() #3 /var/www/services/QMS/add_queue.php(48): IP_QMS->addQueue() #4 {main} thrown in /var/www/services/QMS/database.php on line 29