Fatal error: Uncaught Error: Class 'HTMLPurifier_Definition' not found in /home/aefn/public_html/moodle/lib/htmlpurifier/HTMLPurifier/CSSDefinition.php:7 Stack trace: #0 {main} thrown in /home/aefn/public_html/moodle/lib/htmlpurifier/HTMLPurifier/CSSDefinition.php on line 7