Error is coming while accessing web service in xamarin ui tests

System.Net.Http.HttpRequestException: An error occurred while sending the request ---> System.Net.WebException: Error getting response stream (ReadDone2): ReceiveFailure ---> System.Exception: at System.Net.WebConnection.HandleError (System.Net.WebExceptionStatus st, System.Exception e, System.String where) [0x00031] in <33c5603ad293441aaed2769dd871c706>:0
at System.Net.WebConnection.ReadDone (System.IAsyncResult result) [0x00056] in <33c5603ad293441aaed2769dd871c706>:0
at System.Net.Sockets.SocketAsyncResult+<>c.b__27_0 (System.Object state) [0x00000] in <33c5603ad293441aaed2769dd871c706>:0
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00015] in <2722d81e5b26475cb5f475fea055f291>:0
at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <2722d81e5b26475cb5f475fea055f291>:0
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <2722d81e5b26475cb5f475fea055f291>:0
at System.Net.WebConnection.HandleError (System.Net.WebExceptionStatus st, System.Exception e, System.String where) [0x00031] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/System/System.Net/WebConnection.cs:439
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetResponse (System.IAsyncResult asyncResult) [0x00059] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/System/System.Net/HttpWebRequest.cs:1033
at System.Threading.Tasks.TaskFactory1[TResult].FromAsyncCoreLogic (System.IAsyncResult iar, System.Func2[T,TResult] endFunction, System.Action1[T] endAction, System.Threading.Tasks.Task1[TResult] promise, System.Boolean requiresSynchronization) [0x0000f] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:550
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535 at System.Net.Http.HttpClientHandler+<SendAsync>d__64.MoveNext () [0x003d3] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/System.Net.Http/System.Net.Http/HttpClientHandler.cs:402 --- End of inner exception stack trace --- at System.Net.Http.HttpClientHandler+<SendAsync>d__64.MoveNext () [0x0046c] in /Users/builder/data/lanes/5533/mono-mac-sdk/external/bockbuild/builds/mono-x64/mcs/class/System.Net.Http/System.Net.Http/HttpClientHandler.cs:406 --- End of stack trace from previous location where exception was thrown --- at Xamarin.UITest.Shared.Http.HttpClient.SendData (System.String endpoint, System.String method, System.Net.Http.HttpContent content, Xamarin.UITest.Shared.Http.ExceptionPolicy exceptionPolicy, System.Nullable1[T] timeOut) [0x000ea] in <0ea59db5aaf943039918d5008bfc5053>:0
at Xamarin.UITest.Shared.Http.HttpClient.Post (System.String endpoint, System.String arguments, Xamarin.UITest.Shared.Http.ExceptionPolicy exceptionPolicy, System.Nullable1[T] timeOut) [0x00017] in <0ea59db5aaf943039918d5008bfc5053>:0 at Xamarin.UITest.Shared.Http.HttpClient.Post (System.String endpoint, System.Object arguments, Xamarin.UITest.Shared.Http.ExceptionPolicy exceptionPolicy, System.Nullable1[T] timeOut) [0x00019] in <0ea59db5aaf943039918d5008bfc5053>:0
at Xamarin.UITest.iOS.HttpCalabashConnection.Map (System.Object arguments) [0x00000] in <0ea59db5aaf943039918d5008bfc5053>:0
at Xamarin.UITest.iOS.iOSGestures.InternalQuery[T] (Xamarin.UITest.Queries.AppQuery query, System.Object[] args, System.String methodName) [0x00046] in <0ea59db5aaf943039918d5008bfc5053>:0
at Xamarin.UITest.iOS.iOSGestures.Query (Xamarin.UITest.Queries.AppQuery query) [0x0000d] in <0ea59db5aaf943039918d5008bfc5053>:0
at Xamarin.UITest.iOS.iOSApp+c__AnonStorey1C+c__AnonStorey1D.<>m__0 () [0x00000] in <0ea59db5aaf943039918d5008bfc5053>:0
at Xamarin.UITest.Shared.WaitForHelper.WaitForAnyOrDefault[T] (System.Func1[TResult] query, T[] defaultValue, System.Nullable1[T] timeout, System.Nullable1[T] retryFrequency, System.Nullable1[T] postTimeout) [0x00023] in <0ea59db5aaf943039918d5008bfc5053>:0