Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\IComparable" not found in /home/ptstore4/public_html/pointofsale168.ptcstore.net/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Worksheet.php:34 Stack trace: #0 {main} thrown in /home/ptstore4/public_html/pointofsale168.ptcstore.net/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Worksheet.php on line 34