Fatal error: Uncaught Error: Class "HTMLPurifier_AttrDef" not found in D:\trms\htdocs\trms3\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\CSS\Background.php:7
Stack trace:
#0 {main}
thrown in D:\trms\htdocs\trms3\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\CSS\Background.php on line 7