Ninja
That's why I said you're answering without even making attempt to understand what the problem was.
The problem is that Jomsocial is depending on "AWS SDK for PHP" to use AWS services, same as Fabrik too, now since I had Fabrik running earlier, Jomsocial redclaring that library caused a problem. So I edited Jomsocial core file to stop redclaring that library, and all is working well.
Have this communicated to your developers to have a check if library available before declaring it, now I will have to remember to edit that file everytime I make an update, which is cumbersome and prone to errors.