Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Calculation\LookupRef\LookupBase' not found in /var/www/html/lib/php-spreadsheet/src/PhpSpreadsheet/Calculation/LookupRef/VLookup.php:9 Stack trace: #0 {main} thrown in /var/www/html/lib/php-spreadsheet/src/PhpSpreadsheet/Calculation/LookupRef/VLookup.php on line 9