提示这个错误

Notice: Undefined property: Smarty::$cahce_dir in D:\phpStudy\WWW\mvcclass\smarty\smarty\Smarty.class.php on line 705

Fatal error: Uncaught --> Smarty: Call of unknown method 'dispaly'. <-- thrown in D:\phpStudy\WWW\mvcclass\smarty\smarty\sysplugins\smarty_internal_templatebase.phpon line 819