Fatal error: Uncaught Error: Class 'Box\Spout\Writer\Exception\WriterException' not found in /home/aefn/public_html/moodle/lib/spout/src/Spout/Writer/Exception/Border/InvalidNameException.php:8 Stack trace: #0 {main} thrown in /home/aefn/public_html/moodle/lib/spout/src/Spout/Writer/Exception/Border/InvalidNameException.php on line 8