Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Style\Supervisor" not found in /var/www/html/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Style/Borders.php:7 Stack trace: #0 {main} thrown in /var/www/html/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Style/Borders.php on line 7