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Warning: Undefined array key "t_id" in /var/www/services/QMS/get_queue.php on line 37

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /var/www/services/QMS/database.php:144 Stack trace: #0 /var/www/services/QMS/database.php(144): mysqli_query() #1 /var/www/services/QMS/get_queue.php(37): database->displayQueue() #2 /var/www/services/QMS/get_queue.php(45): IP_QMS->DisplayQueueData() #3 {main} thrown in /var/www/services/QMS/database.php on line 144