Fatal error: Uncaught Error: Class 'HTMLPurifier_AttrTransform' not found in /home/app/htdocs/ninja/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetNoopener.php:12
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetNoopener.php on line 12