Fatal error: Uncaught Error: Interface 'PhpOffice\PhpSpreadsheet\Writer\IWriter' not found in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/Writer/BaseWriter.php:5 Stack trace: #0 {main} thrown in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/Writer/BaseWriter.php on line 5