Can't get MVC MiniProfiler to show on ASP.net website

My web.config file:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <configSections>
    <section name="rewriter" requirePermission="false" type="Intelligencia.UrlRewriter.Configuration.RewriterConfigurationSectionHandler, Intelligencia.UrlRewriter" />
  </configSections>
  <system.web>
    <customErrors mode="On" redirectMode="ResponseRewrite">
      <error statusCode="500" redirect="~/Content/ErrorPages/500.aspx" />
      <error statusCode="404" redirect="~/Content/ErrorPages/404.aspx" />
    </customErrors>
    <compilation debug="true" targetFramework="4.5.1" />
    <httpRuntime targetFramework="4.5.1" />
    <httpModules>
      <add type="Intelligencia.UrlRewriter.RewriterHttpModule, Intelligencia.UrlRewriter" name="UrlRewriter" />
    </httpModules>
  </system.web>
  <rewriter configSource="Config\URLRewrites.config" />
  <appSettings configSource="Config\Settings.config" />
    <system.webServer>
      <validation validateIntegratedModeConfiguration="false" />
      <httpErrors errorMode="Custom">
            <remove statusCode="500" subStatusCode="-1" />
            <remove statusCode="404" subStatusCode="-1" />
            <error statusCode="404" path="/Content/ErrorPages/404.aspx" responseMode="ExecuteURL" />
            <error statusCode="500" path="/Content/ErrorPages/500.aspx" responseMode="ExecuteURL" />
        </httpErrors>
        <modules runAllManagedModulesForAllRequests="true">
          <remove name="UrlRewriter" />
          <add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule,Intelligencia.UrlRewriter" preCondition="managedHandler" />
        </modules>
      <handlers>
        <add name="MiniProfiler" path="mini-profiler-resources/*" verb="*" type="System.Web.Routing.UrlRoutingModule" resourceType="Unspecified" preCondition="integratedMode" />
      </handlers>
    </system.webServer>    
</configuration>

My global.asax:

using System;
using System.Web;
using StackExchange.Profiling;

namespace C3
{
    public class Global : HttpApplication
    {
        protected void Application_BeginRequest(object sender, EventArgs e)
        {
            // Force to HTTPS
            if (!HttpContext.Current.Request.IsSecureConnection)
            {
                Response.Redirect(Settings.SecureRootDomain + HttpContext.Current.Request.RawUrl);
            }

            if (Request.IsLocal)
            {
                MiniProfiler.Start();
            } 
        }

        protected void Application_EndRequest()
        {
            MiniProfiler.Stop();
        }
    }
}

Content page:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="C3.Default"%>
<%@ Import Namespace="C3.Code" %>
<%@ Import Namespace="StackExchange.Profiling" %>
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <%
        SEO.CheckURL("/");
    %>
    <title></title>
    <%=MiniProfiler.RenderIncludes() %>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        dum de dum
    </div>
    </form>

</body>
</html>

And code behind:

protected void Page_Load(object sender, EventArgs e)
{
    var profiler = MiniProfiler.Current; // it's ok if this is null
    using (profiler.Step("Set page title"))
    {
        Page.Title = "Home Page";
    }
    using (profiler.Step("Doing complex stuff"))
    {
        using (profiler.Step("Step A"))
        { // something more interesting here
            Thread.Sleep(100);
        }
        using (profiler.Step("Step B"))
        { // and here
            Thread.Sleep(250);
        }
    }
}

Any ideas why the MiniProfiler isn't showing anything?

Update

If I visit https://127.0.0.1:3333/mini-profiler-resources/includes.js in my browser, it's returning the JS file! It's just not rendering the includes on the page itself.

If I visit /mini-profiler-resources/results it throws the error:

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

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

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
StackExchange.Profiling.MiniProfilerHandler.GetSingleProfilerResult(HttpContext context) in c:\TeamCity\buildAgent\work\1de24adb938b932d\StackExchange.Profiling\MiniProfilerHandler.cs:292 StackExchange.Profiling.MiniProfilerHandler.ProcessRequest(HttpContext context) in c:\TeamCity\buildAgent\work\1de24adb938b932d\StackExchange.Profiling\MiniProfilerHandler.cs:93 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +912 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +164

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