Fatal error: Uncaught Error: Class 'HTMLPurifier_URIFilter_DisableExternal' not found in /app/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternalResources.php:3 Stack trace: #0 {main} thrown in /app/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternalResources.php on line 3