[ArgumentNullException: Value cannot be null.
Parameter name: source]
System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source, Func`2 predicate) +297
Services.Samita.PortalService.SinglePhrase(PhraseTypes phraseType) in G:\Project\PortalHotelsOrg\Services\Samita\PortalService.cs:89
Common.Helper.PortalManager.SinglePhraseByApiKey(PhraseTypes phraseType) in G:\Project\PortalHotelsOrg\Common\Helper\PortalManager.cs:27
Ui.Controllers.BaseController.BeginExecuteCore(AsyncCallback callback, Object state) in G:\Project\PortalHotelsOrg\WhiteLabel\Controllers\BaseController.cs:98
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +166
System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +711
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__4(AsyncCallback asyncCallback, Object asyncState, ProcessRequestState innerState) +93
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +73
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +166
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +522
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +1020
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +195
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +128