MVC Postal conflicting with _viewstart

Question

My app is producing the error

Object reference not set to an instance of an object.

For some reason Postal is giving an error with the layouts in the root _ViewStart.cshtml specifically the first if statement which is shown below.

_ViewStart.cshtml

    if (this.User.IsInRole("Admin") || !this.User.Identity.IsAuthenticated)
{
    Layout = "~/Views/Shared/_Layout.cshtml";
}
else if (this.User.IsInRole("Territorial Strategic Planning Coordinator") || this.User.IsInRole("Programme Secretary") || this.User.IsInRole("IT") || !this.User.Identity.IsAuthenticated)
{
    Layout = "~/Views/Shared/_LayoutLevel1.cshtml";
}  
else if (this.User.IsInRole("Divison Commander") || !this.User.Identity.IsAuthenticated)
{
    Layout = "~/Views/Shared/_LayoutLevel2.cshtml";
}
else if (this.User.IsInRole("Corps Officer") || this.User.IsInRole("Centre Admin") || !this.User.Identity.IsAuthenticated)
{
    Layout = "~/Views/Shared/_LayoutLevel3.cshtml";
}

The code I'm using within my controller is :

 dynamic email = new Email("GoalNotification");
                email.ResponseID = goal.ResponseID;
                email.User = user.UserName;
                email.To = user.Email;
                email.Send();

and the Postal View is : GoalNotification.cshtml

To: @ViewBag.To
Subject: Goal Notification for Response : @ViewBag.ResponseID

<div>

    <p style="font-size:large; font-weight:bold">
        Dear @ViewBag.User
    </p>
    <p>
        This is a system generated notification to notify you that one or more of your goals need attention.
    </p>
    <p>
        Please revise and re-submit.
    </p>

    <p>Kind Regards</p>

    <p>TSP</p>
    ----------------------------------------------------------------------------------
    <p style="font-weight:100"><u>Contact Details</u></p>
    <p>Office Number: </p>
    <p>Email Address: </p>
    <p>Physical Address: </p>
    <hr />
</div>

Is there something I am doing wrong here? and is there any way to fix this? Its my first time using Postal. Thanks for any help.

Edit: Im only getting this error because MVC Postal seems to be overriding my root _ViewStart. The program runs normal without it.

Postal has an issue when there is more than one layout specified it seems. If i have one set layout it works. Unfortunately I need to have them.

The Stack Trace :

    [NullReferenceException: Object reference not set to an instance of an object.]
   ASP._Page_Views__ViewStart_cshtml.Execute() in c:\Users\Shahil\Desktop\TSPMVC Backups\2016\28-01-2016\TSP MVC\TSP MVC\Views\_ViewStart.cshtml:3
   System.Web.WebPages.StartPage.ExecutePageHierarchy() +73
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +131
   System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +695
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +382
   Postal.EmailViewRenderer.RenderView(IView view, ViewDataDictionary viewData, ControllerContext controllerContext, ImageEmbedder imageEmbedder) +182
   Postal.EmailViewRenderer.Render(Email email, String viewName) +204
   Postal.EmailService.CreateMailMessage(Email email) +72
   Postal.EmailService.Send(Email email) +65
   Postal.Email.Send() +56
   CallSite.Target(Closure , CallSite , Object ) +189
   System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid1(CallSite site, T0 arg0) +432
   TSP_MVC.Controllers.GoalsController.AdminEdit(Goal goal) in c:\Users\Shahil\Desktop\TSPMVC Backups\2016\28-01-2016\TSP MVC\TSP MVC\Controllers\GoalsController.cs:195
   lambda_method(Closure , ControllerBase , Object[] ) +180
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +59
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +435
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +60
   System.Web.Mvc.Async.ActionInvocation.InvokeSynchronousActionMethod() +76
   System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +36
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +136
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +102
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +49
   System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +117
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +323
   System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +44
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +47
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +136
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +102
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +50
   System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +72
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +185
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +42
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +133
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +40
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +34
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +70
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +133
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +37
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +44
   System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +39
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +62
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +133
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +37
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +39
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +39
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +39
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +70
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +133
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56
   System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +37
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +40
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +38
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9721605
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155