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Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/enrepco/enrepcore.enrep.co.uk/functions/notesSave.php:8 Stack trace: #0 /home/enrepco/enrepcore.enrep.co.uk/functions/notesSave.php(8): mysqli_query(NULL, 'UPDATE `itemdet...') #1 {main} thrown in /home/enrepco/enrepcore.enrep.co.uk/functions/notesSave.php on line 8