[CMSContext.CurrentUser]: User 'public' not found!

Server Error in '/' Application.

[CMSContext.CurrentUser]: User 'public' not found!

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Exception: [CMSContext.CurrentUser]: User 'public' not found!

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[Exception: [CMSContext.CurrentUser]: User 'public' not found!]
   CMS.CMSHelper.CMSContext.get_GlobalPublicUser() +182
   CMS.CMSHelper.ContextData.GetCurrentUser(Boolean& loadUserData, Boolean cacheResult) +595
   CMS.CMSHelper.ContextData.get_CurrentUser() +88
   CMS.UIControls.DocumentBase.get_CurrentUser() +26
   CMS.UIControls.DocumentBase.SetCulture() +17
   CMS.UIControls.DocumentBase.PreInit() +180
   CMS.UIControls.ContentPage.OnPreInit(EventArgs e) +67
   System.Web.UI.Page.PerformPreInit() +38
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +302

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4676.0