提交bug时，报错Uncaught Error: Class 'HTMLPurifier_AttrDef_Text' not found已解决悬赏5积分

提交bug时报错如下，怎么解决？谢谢~

Uncaught Error: Class 'HTMLPurifier_AttrDef_Text' not found in D:\xampp\zentao\lib\purifier\HTMLPurifier\AttrTypes.php:31
Stack trace:
#0 D:\xampp\zentao\lib\purifier\HTMLPurifier\HTMLModuleManager.php(77): HTMLPurifier_AttrTypes->__construct()
#1 D:\xampp\zentao\lib\purifier\HTMLPurifier\HTMLDefinition.php(187): HTMLPurifier_HTMLModuleManager->__construct()
#2 D:\xampp\zentao\lib\purifier\HTMLPurifier\Config.php(630): HTMLPurifier_HTMLDefinition->__construct()
#3 D:\xampp\zentao\lib\purifier\HTMLPurifier\Config.php(611): HTMLPurifier_Config->initDefinition('HTML')
#4 D:\xampp\zentao\lib\purifier\HTMLPurifier\Config.php(415): HTMLPurifier_Config->getDefinition('HTML', true, false)
#5 D:\xampp\zentao\lib\base\filter\filter.class.php(1016): HTMLPurifier_Config->getHTMLDefinition(true)
#6 D:\xampp\zentao\module\bug\model.php(145): baseFixer->stripTags('steps', '
#7 D:\xampp\zentao\module\bug\control.php(264): bugModel->create('')
#8 D:\xampp\zentao\framework\base\router.class.php(1703): bug-> in D:\xampp\zentao\lib\purifier\HTMLPurifier\AttrTypes.php on line 31 when visiting bug-create-6-0-moduleID=0
parsererrorSyntaxError: Unexpected token '<', "
"... is not valid JSON