Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Reader\BaseReader' not found in /var/www/html/portal/vendor/PhpOffice/phpspreadsheet/src/PhpSpreadsheet/Reader/Gnumeric.php:21 Stack trace: #0 {main} thrown in /var/www/html/portal/vendor/PhpOffice/phpspreadsheet/src/PhpSpreadsheet/Reader/Gnumeric.php on line 21