HYbridauth for facebook login doesn't work

I was trying to configure the hybridauth library so that I can use the the google + and the facebook sign in. But it keeps me giving a fatal error:

 Fatal error: require(): Failed opening required 'Facebook\Facebook.php' (include_path='.:/var/www/magilla/lib:/var/www/magilla/models') in /var/www/magilla/lib/RPC/Util.php on line 168

I followed each and every step of their documentation. I have used the composer to install the library. The library version is 2.9 and the facebook graph sdk, the most recent version of github

READ EDIT*2 for a proper solution instead

I am encountering the same issue and I suppose you install hybridauth the same way as I did, which is running composer require hybridauth/hybridauth on your project root folder.

I solved this by running composer install within the hybridauth directory where its composer.json exist, that will install facebook sdk within the hybridauth directory where the autoload.php is being load by the script (I personally feel like it is more like a hack than a proper solution... but I have a feeling that the hybridauth developer expect you to clone then run the composer install instead of composer requiring it...I maybe wrong as I just start using composer as well)

*EDIT check out the issue on their github, there is a bug where the vendor path is being replaced by one in their code, it also mention it is being fixed in later commit. I am new to composer as well so I don't know how to specific the commit for it to update to... if you know how to do it let me know as well

*EDIT*2 alright, I updated to 2.9.3-dev and it seems to solve the issue without generating any new one, I also use that for google and twitter and those are fine too. To update, edit your composer.json to this

"require": {
        "hybridauth/hybridauth": "^2.9-dev"
    }

then run composer update on your command prompt, things should work as long as you require the composer autoload.php for your script