How to fix the CSRF hidden field was missing?

NS Kentico asked on December 18, 2020 19:00

Exception type: CMS.Protection.Web.UI.CsrfException Stack trace: at CMS.Protection.Web.UI.CsrfProtection.ThrowCsrfException(String message, Exception innerException) at CMS.Protection.Web.UI.CsrfProtection.OnPostMapRequestHandlerExecute(Object sender, EventArgs eventArgs) at CMS.Base.AbstractHandler.CallEventHandler[TArgs](EventHandler1 h, TArgs e) at CMS.Base.AbstractHandler.Raise[TArgs](String partName, List1 list, TArgs e, Boolean important) at CMS.Base.SimpleHandler2.RaiseExecute(TArgs e) at CMS.Base.SimpleHandler2.RaiseExecute(TArgs e) at CMS.Base.SimpleHandler`2.StartEvent(TArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Event URL:/404 URL referrer:

User agent:MacOutlook/16.44.20121301 (Intelx64 Mac OS X 11.1 (Build 20C69))

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