Fixing 403 Forbidden Error for Asp.Net MVC Bundles 5. March 2014 ozgur (0) Latest web application I was working on was worknig happily fine. I decided to run a performance test and turned the debugging off. When I run the application all the styling was gone and there were bunch of script errors. I inspected the page and saw "403- Forbidden: Access is denied" on some of bundled scripts and styles.Problem was that I had paths like content/theme or scripts/theme which were also exists as actual folders on my application. The solution is to change the registered name of the bundle to not be the same as anything that exists in the file system.