I had the same problem, solved just now.
It seems that the routing.xml
file is not downloaded, search for it in the folder \vendor\friendsofsymfony\facebook-bundle\FOS\FacebookBundle\Resources\config
of your app.
If is not here, then simply download it and copy it from the repository "https://github.com/FriendsOfSymfony/FOSFacebookBundle/blob/master/Resources/config/routing.xml"
routing.xml
as below:
<?xml version="1.0" encoding="UTF-8" ?>
<routes xmlns="http://symfony.com/schema/routing"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">
<route id="fos_facebook_channel" pattern="/channel.html">
<default key="_controller">FOSFacebookBundle:Facebook:channel</default>
<requirement key="_method">GET</requirement>
</route>
</routes>