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