Fatal error: Uncaught TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, null given in C:\Apache24\htdocs\Quantum\WebForms\CustomerwiseSalesExcel.php:26 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\Quantum\WebForms\CustomerwiseSalesExcel.php on line 26