k3cloud6.0+2016年9月补丁；
昨天软件都正常，今天所有客户端登陆软件时提示报错无法登陆软件；如截图；这个如何处理？

An item with the same key has already been added.

--------------------ExWrapperInnerException--------------------
IsBoughtenUszhHK is error in GetProductModel.
at Kingdee.BOS.ServiceHelper.DataCenterService.GetLangList(Context ctx)
at Kingdee.BOS.ServiceFacade.ServicesStub.Account.AccountService.GetDataCenterLoginLanguages(String dbId, DatabaseType dbType, String clientLCName)
--------------------ExWrapperException--------------------
Exception has been thrown by the target of an invocation.
at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Kingdee.BOS.ServiceFacade.KDServiceFx.ServiceExecutor.Execute(KDServiceContext context, ServiceType svcType, String[] paraValues, SerializerProxy serializeProxy, ServiceType beginMethod)
--------------------Exception--------------------
An item with the same key has already been added.
at Kingdee.BOS.ServiceFacade.KDServiceClient.KDServiceClient.ParseException(String message, Encoding encoding, MessageFormats format)
at Kingdee.BOS.ServiceFacade.KDServiceClient.KDServiceClient.GetResponseContent(HttpWebResponse rsp, KDBaseRequest kdrequest)
at Kingdee.BOS.ServiceFacade.KDServiceClient.KDServiceClient.GetResponseCallback(IAsyncResult result, KDBaseRequest kdrequest, Action`1 callback)