I am using DNN 8.0.3 and I installed a Metropolis 01.00.00 skin. After I applied the skin to my Home page, I get the below exception. Any ideas on what is causing it?

DotNetNuke.Framework.PageBase - An error has occurred while loading page.

System.NullReferenceException: Object reference not set to an instance of an object.

at DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectProviderName, String ObjectNamespace, String ObjectAssemblyName, Boolean UseCache, Boolean fixAssemblyName)

at DotNetNuke.UI.Skins.NavObjectBase.InitializeNavControl(Control objParent, String strDefaultProvider)

at DotNetNuke.UI.Skins.Controls.Nav.OnInit(EventArgs e)

at System.Web.UI.Control.InitRecursive(Control namingContainer)

at System.Web.UI.Control.InitRecursive(Control namingContainer)

at System.Web.UI.Control.AddedControl(Control control, Int32 index)

at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)

at System.Web.UI.Control.InitRecursive(Control namingContainer)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

2016-08-18 23:05:10,912 [my-pc][Thread:26][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?tabid=17&error=Object+reference+not+set+to+an+instance+of+an+object.&content=0