Fatal error: Uncaught Error: Class 'HTMLPurifier_AttrDef' not found in /home/kingelearn/public_html/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS.php:14
Stack trace:
#0 {main}
thrown in /home/kingelearn/public_html/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS.php on line 14