Fatal error: Uncaught Error: Interface "PHPExcel_RichText_ITextElement" not found in /var/www/binary/vendor/phpoffice/phpexcel/Classes/PHPExcel/RichText/TextElement.php:26 Stack trace: #0 {main} thrown in /var/www/binary/vendor/phpoffice/phpexcel/Classes/PHPExcel/RichText/TextElement.php on line 26