Fatal error: Uncaught Error: Interface 'PhpOffice\PhpSpreadsheet\IComparable' not found in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/RichText/RichText.php:9 Stack trace: #0 {main} thrown in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/RichText/RichText.php on line 9