Error after installation v3.00

I have installed the ultimate collection but when i got to Plugins > Select a Plugin > settings i then get this error:

Server Error in '/' Application.
Value cannot be null.
Parameter name: first


[ArgumentNullException: Value cannot be null.
Parameter name: first]
   System.Linq.Enumerable.Union(IEnumerable`1 first, IEnumerable`1 second) +4098927
   Nop.Web.Framework.Themes.ThemeableVirtualPathProviderViewEngine.FindThemeableView(ControllerContext controllerContext, String viewName, String masterName, Boolean useCache, Boolean mobile) in \\vmware-host\shared folders\Desktop\New Folder (2)\Presentation\Nop.Web.Framework\Themes\ThemeableVirtualPathProviderViewEngine.cs:214
   Nop.Web.Framework.Themes.ThemeableVirtualPathProviderViewEngine.FindView(ControllerContext controllerContext, String viewName, String masterName, Boolean useCache) in \\vmware-host\shared folders\Desktop\New Folder (2)\Presentation\Nop.Web.Framework\Themes\ThemeableVirtualPathProviderViewEngine.cs:255
   System.Web.Mvc.<>c__DisplayClassc.<FindView>b__a(IViewEngine e) +24
   System.Web.Mvc.ViewEngineCollection.Find(Func`2 lookup, Boolean trackSearchedPaths) +126
   System.Web.Mvc.ViewEngineCollection.FindView(ControllerContext controllerContext, String viewName, String masterName) +164
   System.Web.Mvc.ViewResult.FindView(ControllerContext context) +84
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +116
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +23
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +245
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +22
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +245
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +22
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +245
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +22
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +245
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +22
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +176
   System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +75
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +99
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +39
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +29
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
   System.Web.Mvc.MvcHandler.EndProcessRequest(

Hi mickk,

That is quite strange. So you are saying that you get this error only when you go to Plugins -> Nop xxx -> Settings.Did you modify the Global.asax after you installed the plugins? Are you using the official nopCommerce version 3.0 (as 2 weeks after it was released Andrei still made changes to it) from here.
Did you update all plugins with the Core and the other ones? Does this happen for all our plugins? Have you made any modifications to your nopCommerce installation?

Sorry for the many questions but we really want to find out why you get this error and help you to resolve it.

Thanks