UPGRADE AND NOW THE NEW PROBLEM

Hi @maniekgrob86!

The problem you see is happening, because there is something wrong with your PHP versions. This new Facebook api is using “namespaces”: http://php.net/manual/en/language.namespaces.rationale.php
which is only available from PHP 5.3, and the error you are seeing is given by the namespace character:
$fb = new Facebook\Facebook
That error message for this line should only appear in PHP 5.2 or lower versions. So I would suggest contacting your server host about this issue.