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Fatal error: Uncaught TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, null given in C:\Apache24\htdocs\Quantum\WebForms\PriceListExcel.php:17 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\Quantum\WebForms\PriceListExcel.php on line 17