A public action method 'runtask' was not found on controller 'Nop.Admin.Controllers.ScheduleTaskController'

Hi to everybody, we are having a strange issue with our nopcommerce 3.9 version

we are running in several errors in the log as the follow:

Errore

A public action method 'runtask' was not found on controller 'Nop.Admin.Controllers.ScheduleTaskController'.
Messaggio completo
  
System.Web.HttpException (0x80004005): A public action method 'runtask' was not found on controller 'Nop.Admin.Controllers.ScheduleTaskController'. in System.Web.Mvc.Controller.HandleUnknownAction(String actionName) in System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) in System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) in System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) in System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) in System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) in System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) in System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) in System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) in System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() in System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) in System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

URL pagina  
http://www.hobbystore.it/scheduletask/runtask

Anyone knows how to fix it?

Thankyou for your help
Lorenzo