Q:

Bad Request on sending Pusher Requests

I'm getting 400 Bad Request when pushing a event.  But the request is updated in the pusher dashboard. 
This is the same issue reported in This Ticket.  But didn't solved my problem so far. 
Error Image

A:

I managed to solve my problem.  Basically what I did is update composer again.  The version of vender files do a massive part in the Laravel application.