ElmahR Dashboard throws "Unable to compile template" error when sending commands

I worked in the installation documentation found here . I have an example dashboard application and an example client application that throws Elmah errors in an SQL database.

The client application runs elmah correctly and I can view error logs in elmah.axd. When I try to access the Dashboard application, the page loads and discards the message "Sending Commands". Then I get the 500 Internal Server error from the first command "send? Transport = ...".

The Dashboard application is an ASP.Net MVC 5 application running on my localhost.

This is the URL that generates the error:

http://localhost/ElmahR/elmahr/commands/send?transport=serverSentEvents&connectionToken=k6HUNtFtmSXrJZgH_2oexTg_cx-el2G7PhJ6NZD4aBLT_svpboE31meZG4wazu7VDS8_WWRjnnV-yGSVhBzBbYWlXFTo08onRvNCzYgYhH5kwMw9KvKOSQIakT6Wzv_Y0

When I check for this error, this is what I get:

RazorEngine.Templating.TemplateCompilationException
Unable to compile template. Source file 'C:\Windows\TEMP\lahvjqh3.0.cs' could not be found Other compilation errors may have occurred. Check the Errors property for more information.

System.AggregateException: One or more errors occurred. ---> RazorEngine.Templating.TemplateCompilationException: Unable to compile template. Source file 'C:\Windows\TEMP\lahvjqh3.0.cs' could not be found

Other compilation errors may have occurred. Check the Errors property for more information.
   at RazorEngine.Compilation.DirectCompilerServiceBase.CompileType(TypeContext context) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Compilation\DirectCompilerServiceBase.cs:line 100
   at RazorEngine.Templating.TemplateService.CreateTemplateType(String razorTemplate, Type modelType) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Templating\TemplateService.cs:line 256
   at RazorEngine.Templating.TemplateService.CreateTemplate(String razorTemplate, Type templateType, Object model) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Templating\TemplateService.cs:line 127
   at RazorEngine.Templating.TemplateService.Parse(String razorTemplate, Object model, DynamicViewBag viewBag, String cacheName) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Templating\TemplateService.cs:line 435
   at ElmahR.Core.Plugins.<BuildPlugins>b__a(<>f__AnonymousType2`2 <>h__TransparentIdentifier6)
   at System.Linq.Enumerable.<>c__DisplayClass12`3.<CombineSelectors>b__11(TSource x)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at ElmahR.Core.StartupConnection.<.ctor>b__1(IConnection c, IRequest r, String cid, String d)
   at ElmahR.Core.StartupConnection.OnReceived(IRequest request, String connectionId, String data)
   at Microsoft.AspNet.SignalR.PersistentConnection.<>c__DisplayClassa.<>c__DisplayClassc.<ProcessRequest>b__7()
   at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(Func`1 func)
   --- End of inner exception stack trace ---
   at Microsoft.Owin.Host.SystemWeb.CallContextAsyncResult.End(IAsyncResult result)
   at System.Web.HttpApplication.CallHandlerExecutionStep.OnAsyncHandlerCompletion(IAsyncResult ar)
---> (Inner Exception #0) RazorEngine.Templating.TemplateCompilationException: Unable to compile template. Source file 'C:\Windows\TEMP\lahvjqh3.0.cs' could not be found

Other compilation errors may have occurred. Check the Errors property for more information.
   at RazorEngine.Compilation.DirectCompilerServiceBase.CompileType(TypeContext context) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Compilation\DirectCompilerServiceBase.cs:line 100
   at RazorEngine.Templating.TemplateService.CreateTemplateType(String razorTemplate, Type modelType) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Templating\TemplateService.cs:line 256
   at RazorEngine.Templating.TemplateService.CreateTemplate(String razorTemplate, Type templateType, Object model) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Templating\TemplateService.cs:line 127
   at RazorEngine.Templating.TemplateService.Parse(String razorTemplate, Object model, DynamicViewBag viewBag, String cacheName) in c:\_git\RazorEngine\src\Core\RazorEngine.Core\Templating\TemplateService.cs:line 435
   at ElmahR.Core.Plugins.<BuildPlugins>b__a(<>f__AnonymousType2`2 <>h__TransparentIdentifier6)
   at System.Linq.Enumerable.<>c__DisplayClass12`3.<CombineSelectors>b__11(TSource x)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at ElmahR.Core.StartupConnection.<.ctor>b__1(IConnection c, IRequest r, String cid, String d)
   at ElmahR.Core.StartupConnection.OnReceived(IRequest request, String connectionId, String data)
   at Microsoft.AspNet.SignalR.PersistentConnection.<>c__DisplayClassa.<>c__DisplayClassc.<ProcessRequest>b__7()
   at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(Func`1 func)<---

Any idea what might be misconfigured in order to throw this error? Is there something I need to change using Razor?

Here is what I see: