Fatal error: Uncaught Error: Interface "OpenSpout\Reader\RowIteratorInterface" not found in /srv/www/htdocs/moodle/lib/openspout/src/Reader/XLSX/RowIterator.php:20 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/openspout/src/Reader/XLSX/RowIterator.php on line 20