How to solve the error WebException: The remote server returned an error: (403) Forbidden?

FIRST CREATED ON 28 May 2025  I  AUTHOR Emma Camacho

If getting the follow error every time when rebuilding the cache of a Datasource or when running a task or in general, when using a Datasource and the Qlik Sense Server has been updated to Qlik Sense November 2024 or higher, upgrade to a higher version of M&D.

Issue

STACK TRACEWebSocketException: Unable to connect to the remote server
at MailAndDeploy.Server.ExtensionMethods.Await(Task pTask, TimeSpan pTimeout)
at MailAndDeploy.Server.Json.Rpc.JsonRpcConnection..ctor(Uri pUri, JsonRpcCookie[] pCookies, JsonRpcHeader[] pHeaders)
at MailAndDeploy.Server.Connectors.QlikSense.QsEoWConnector.EstablishRpcConnection(Uri pUri, JsonRpcCookie[] pCookies, JsonRpcHeader[] pHeaders)
at MailAndDeploy.Server.Connectors.QlikSense.QsEoWConnector.GetAppIdentifiers()
at MailAndDeploy.Server.Services.Management.Ui.QlikSenseServerAppDatasourceSheet.ReloadAppsDropDown()
at MailAndDeploy.Server.Services.Management.Ui.QlikSenseServerAppDatasourceSheet.GeneralPage_AppField_ButtonClicked(String pSender)
WebException: The remote server returned an error: (403) Forbidden.
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Net.WebSockets.ClientWebSocket.d__21.MoveNext()

Resolution

Please install M&D version 3.5.12 or higher.

Looking for Additional Guidance?

If you require more detailed information or further assistance, please visit our comprehensive Online Documentation. Our resources are designed to help you navigate all features and functionalities effectively.

• Related Articles

• What to do if getting the error The remote server returned an error: (403) Forbidden?

  FIRST CREATED ON 19 Feb 2024 I AUTHOR Emma Camacho When rebuilding the cache of a Datasource, generating a Report or running a task the following error will appear if M&D doesn't have permission to access the Qlik Sense App. Issue Der Remoteserver ...

• How to solve the errors Unable to connect to the remote server and The remote server returned an error: (400) Bad Request ?

  FIRST CREATED ON 17 Feb 2025 I AUTHOR Emma Camacho If getting the follow error every other time when rebuilding the cache of a Datasource or when running a task or in general, when using a Datasource, please review the version of Qlik Sense and ...

• What to do if when opening the Designer the server returns HTTP status code: Forbidden

  FIRST CREATED ON 4 May 2020 I AUTHOR Mail & Deploy Team The error The server returned HTTP status code 'Forbidden' when opening the Designer is very likely caused by an Antivirus blocking it. Resolution Add the following folders to the Antivirus ...

• What should I do if I encounter an 'Exception: Forbidden (Code 403): Object read error' in Mail & Deploy?

  FIRST CREATED ON 30 Jun 2023 I AUTHOR Emma Camacho Encountering a 'Forbidden (Code 403): Object read error' in Mail & Deploy can indicate permission or access issues. Here’s a brief guide to help you troubleshoot and resolve this error: * If ...

• How to solve the The CSRF token endpoint has returned status code 'BadRequest' without a CSRF token header problem

  FIRST CREATED ON 21 May 2025 I AUTHOR Emma Camacho The error The CSRF token endpoint has returned status code 'BadRequest' without a CSRF token header when adding a new Qlik Sense Server Datasource using the Authentication Type Impersonation (Section ...