Fatal error: Uncaught Error: Class "HTMLPurifier_AttrDef" not found in C:\Apache24\htdocs\drupal10\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\CSS\BackgroundPosition.php:44 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\drupal10\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\CSS\BackgroundPosition.php on line 44