Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\IComparable" not found in /home/zdpktgd/ptc/vendor.old/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Worksheet.php:35 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Worksheet.php on line 35