Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Chart\Properties' not found in /home/flexinettek/public_html/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Chart/GridLines.php:11 Stack trace: #0 {main} thrown in /home/flexinettek/public_html/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Chart/GridLines.php on line 11