Fatal error: Uncaught Error: Class "HTMLPurifier_DefinitionCache" not found in /Library/WebServer/Documents/Morgan/common/php/vendor/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer.php:3 Stack trace: #0 {main} thrown in /Library/WebServer/Documents/Morgan/common/php/vendor/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer.php on line 3