I've upgraded from DNN 7.2 to DNN_Platform_9.1.1.129-232_Upgrade .

On the Windows 2012 R2 server the upgrade completed 100% , but when I try to access the site I get the following error.

When I run the upgrade on my local host
[NullReferenceException: Object reference not set to an instance of an object.] DotNetNuke.HttpModules.UrlRewrite.BasicUrlRewriter.RewriteUrl(Object sender, EventArgs e) +2737 System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +138 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +90