title: DNN OutputCache Error
body: <p>I'm trying to create a copy of our live DNN (version 8.4.2) on my local as part of an upgrade project. I cannot get to the bottom of the following error. Can anyone throw some light on this?</p>
  
  <pre><code>2018-06-20 07:57:31,511 [IT-Dev01][Thread:7][FATAL] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - System.NullReferenceException: Object reference not set to an instance of an object.
     at DotNetNuke.HttpModules.OutputCaching.OutputCacheModule.OnResolveRequestCache(Object sender, EventArgs 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&amp; completedSynchronously)
  </code></pre>