[已解决]登录发生错误，请帮忙解决

登录进去就有一个错误提示，各位大侠看看是什么原因。



系统加载错误，请与管理员联系...

URL：http://192.168.2.19/Portal/Login.aspx?q=http://192.168.2.19/Portal/default.aspx
消息：Object reference not set to an instance of an object.
堆栈：at OThinker.H3.Portal.UserValidatorFactory.Login(AuthenticationType AuthenticationType, String EngineCode, String UserName, String Password, Boolean isAdminLogin)
 at OThinker.H3.Portal.Login.btnLogin_Click(Object sender, EventArgs e) in c:\Program Files\Authine\H3 BPM\Portal\Login.aspx.cs:line 104
 at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
 at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

已解决，是管理员密码更改了