Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\IComparable" not found in /home/romafi/cofortest/php/php-spreadsheet/src/PhpSpreadsheet/RichText/RichText.php:10 Stack trace: #0 {main} thrown in /home/romafi/cofortest/php/php-spreadsheet/src/PhpSpreadsheet/RichText/RichText.php on line 10