ASP.NET MVC应用程序自定义错误页面未显示在共享主机环境中

I'm having an issue with custom errors on an ASP.NET MVC app I've deployed on my shared host. I've created an ErrorController and added the following code to Global.asax to catch unhandled exceptions, log them, and then transfer control to the ErrorController to display custom errors. This code is taken from I'm having an issue with custom errors on an AS