Fatal error: Uncaught Error: Class "HTMLPurifier_AttrDef_CSS_Number" not found in G:\projects\edutalk-api\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\CSS\AlphaValue.php:3 Stack trace: #0 {main} thrown in G:\projects\edutalk-api\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\CSS\AlphaValue.php on line 3