Warning: include(administration/connection.php): Failed to open stream: No such file or directory in /var/www/html/new_schedule.php on line 5

Warning: include(): Failed opening 'administration/connection.php' for inclusion (include_path='.:/usr/local/lib/php') in /var/www/html/new_schedule.php on line 5

Warning: Undefined variable $con in /var/www/html/new_schedule.php on line 8

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /var/www/html/new_schedule.php:8 Stack trace: #0 /var/www/html/new_schedule.php(8): mysqli_query(NULL, 'SELECT DISTINCT...') #1 {main} thrown in /var/www/html/new_schedule.php on line 8