Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\IComparable" not found in /opt/lampp/htdocs/msjticket/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/RichText/RichText.php:9 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjticket/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/RichText/RichText.php on line 9