Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\IComparable" not found in /home/sabdesenv/public_html/includes/PhpSpreadsheet-master/src/PhpSpreadsheet/RichText/RichText.php:9 Stack trace: #0 {main} thrown in /home/sabdesenv/public_html/includes/PhpSpreadsheet-master/src/PhpSpreadsheet/RichText/RichText.php on line 9