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