__RequestVerificationToken value not set on page load

Vote:
 

__RequestVerificationToken value is not being set on first load of page, which results in an error 500: HttpAntiForgeryException

On first load the cookie is present but with and empy value then on reload of the page the value gets set and now the form submission works.

I have removed the [ContentOutputCache] from the PageController and the <%= Html.GenerateAntiForgeryToken(Model) %> is present in the FormContainerBlock.ascx file.

Exception type - System.Web.Mvc.HttpAntiForgeryException

Failed method - EPiServer.Forms.Internal.Security.AntiForgeryService.Validate

Log:

System.Web.Mvc.HttpAntiForgeryException:
   at EPiServer.Forms.Internal.Security.AntiForgeryService.Validate (EPiServer.Forms, Version=4.29.0.0, Culture=neutral, PublicKeyToken=8fe83dea738b45b7)
   at EPiServer.Forms.Controllers.DataSubmitController.Submit (EPiServer.Forms, Version=4.29.0.0, Culture=neutral, PublicKeyToken=8fe83dea738b45b7)
   at lambda_method (Anonymously Hosted DynamicMethods Assembly, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null)
   at System.Web.Mvc.ReflectedActionDescriptor.Execute (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12 (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at System.Web.Mvc.Controller.ExecuteCore (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at System.Web.Mvc.ControllerBase.Execute (System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35)
   at EPiServer.Forms.Controllers.FormsMvcHandler.ProcessController (EPiServer.Forms, Version=4.29.0.0, Culture=neutral, PublicKeyToken=8fe83dea738b45b7)
   at EPiServer.Forms.Controllers.FormsMvcHandler.BeginProcessRequest (EPiServer.Forms, Version=4.29.0.0, Culture=neutral, PublicKeyToken=8fe83dea738b45b7)
   at System.Web.HttpApplication+CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute (System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a)
   at System.Web.HttpApplication+<>c__DisplayClass285_0.<ExecuteStepImpl>b__0 (System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a)
   at System.Web.HttpApplication.ExecuteStepImpl (System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a)
   at System.Web.HttpApplication.ExecuteStep (System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a)
#229684
Edited, Oct 21, 2020 11:14
Vote:
 

Do you have any output caching on the page?  It could cause this issue.

#231181
Nov 20, 2020 19:22
* You are NOT allowed to include any hyperlinks in the post because your account hasn't associated to your company. User profile should be updated.