Wikia/app — pull request #5443 by nandy-andy (2014-11-24 11:20:56+00:00)
Title: HG-385 P2 fix: added InvalidDataApiException to autloader and added fallback to navigation exception

There are some wikias with broken navigation data and not loaded `ApiExceptions.php` file which resulted with a white page for some users using Mercury. First step was to add missing exception to autoloader and then handle the navigation exception.