title: Response content-type text/html while expected application/json
body: <p>I have the same application on two different servers. On one server there is everything OK the application is loaded correctly. On the second server the application can't load. The error message is Unexpected token &lt; in JSON at position 0. When I open developer tools in a browser I see that response content type header on the second server is text/html while on the first server is application/json what it should be. 
  On both servers in IIS MIME Types is .json  application/json.
  What else could block the corect content type on the second server?</p>