Okay, this is fixed.
So the problem was the Audiosync script inside playmaker event that we made,
it was pointing an object that is actually hidden. Script is repeats itself every 4 seconds so that is probably why we had that much error messages.
Some reason though, none of the error messages told us about that broken script.
In order to find that error, We erased the unity scene part by part and we finally end up with a group of objects adn a single object. Inside that object there was playmaker events and in those events, there was a tiny little cute script didn't behave right or we didn't behave right, eighter way.
So, what we learned at the end of this fantastic episode is that "don't trust UNity's play mode, build and test often"