DependencyHandler.axd?type=css throws 501 when debug="false"

[rasmuseeg]

Create a stylesheet with the following comment:

/**
  * @license
  * MyFonts Webfont Build ID 3317708, 2016-12-07T02:20:35-0500
  * 
  * The fonts listed in this notice are subject to the End User License
  * Agreement(s) entered into by the website owner. All other parties are 
  * explicitly restricted from using the Licensed Webfonts(s).
  * 
  * You may obtain a valid license at the URLs below.
  * 
  * Webfont: PancettaSerifPro-Regular by Mint Type
  * URL: http://www.myfonts.com/fonts/konstantynov/pancetta-serif-pro/regular/
  * Copyright: Copyright (c) 2013 by Andriy Konstantynov. All rights reserved.
  * Licensed pageviews: 500,000
  * 
  * Webfont: PancettaSerifPro-Italic by Mint Type
  * URL: http://www.myfonts.com/fonts/konstantynov/pancetta-serif-pro/italic/
  * Copyright: Copyright (c) 2013 by Andriy Konstantynov. All rights reserved.
  * Licensed pageviews: 500,000
  * 
  * Webfont: Geogrotesque-Bd by Emtype Foundry
  * URL: http://www.myfonts.com/fonts/emtype/geogrotesque/bold/
  * Copyright: Copyright (c) 2015 by Eduardo Manso. All rights reserved.
  * Licensed pageviews: 100,000
  * 
  * Webfont: Geogrotesque-Rg by Emtype Foundry
  * URL: http://www.myfonts.com/fonts/emtype/geogrotesque/regular/
  * Copyright: Copyright (c) 2015 by Eduardo Manso. All rights reserved.
  * Licensed pageviews: 100,000
  * 
  * 
  * License: http://www.myfonts.com/viewlicense?type=web&buildid=3317708
  * 
  * © 2016 MyFonts Inc
  */

Include this stylesheet using @Html.RequireCss("~/path/to/style.css")

[Shazwazza]

What version are you using?

[rasmuseeg]

@Shazwazza I where using what comes with the Umbraco.Core 7.5.6, but then i updated to the latest version 1.9.2.