Fatal error: Uncaught Error: Interface "OpenSpout\Writer\Common\Manager\WorkbookManagerInterface" not found in /srv/www/htdocs/moodle/lib/openspout/src/Writer/Common/Manager/AbstractWorkbookManager.php:23 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/openspout/src/Writer/Common/Manager/AbstractWorkbookManager.php on line 23