There's a lot broken with the stock standard ASP.NET MVC error handling. It can't display cshtml (Razor) pages :( They 302 redirect to the html error page. There's too many places to wire up, to handle errors.
Fear not! This package can save your day!
Install it and then define your error pages in...
* Json Api helpers
Look at your MVC app.
Now back to me.
Now go back at your MVC App. It's missing a nice standard JSON Api wrapper .. even for errors? Sadly, it's not using ...
Me: Sons of Djorks, I am Magical Unicorn - Mvc Request Header Authorization Attribute.
You: You're 7 GitHub projects, tall ...
Me: Yes, I've heard. Kills Meme's by the hundreads and if he were here he'd consume Rails with fireballs from his eyes and bolts of lightning from his arse. I AM MGMRHAA. ...