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Fatal error: Uncaught TypeError: array_diff(): Argument #2 must be of type array, null given in /home/welllkcw/public_html/summary.php:43 Stack trace: #0 /home/welllkcw/public_html/summary.php(43): array_diff() #1 {main} thrown in /home/welllkcw/public_html/summary.php on line 43