Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Reader\Xml\Style\StyleBase' not found in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/Reader/Xml/Style/Border.php:9 Stack trace: #0 {main} thrown in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/Reader/Xml/Style/Border.php on line 9