Fatal error: Uncaught Error: Class 'PhpOffice\PhpPresentation\Writer\PowerPoint2007\AbstractSlide' not found in /var/www/html/scorm/vendor/phpoffice/phppresentation/src/PhpPresentation/Writer/PowerPoint2007/PptSlideLayouts.php:30 Stack trace: #0 {main} thrown in /var/www/html/scorm/vendor/phpoffice/phppresentation/src/PhpPresentation/Writer/PowerPoint2007/PptSlideLayouts.php on line 30