I just created a new project using the third person game template. If I set the number of clients to 2 and play the game, the first player screen is ok, but the second player’s screen is completely black.
This also happens using the other templates, on both 4.0.2 and 4.1.0 versions.
I had this same issue and it has to do with my system “blocking” localhost (127.0.0.1). Mine was caused by my bigfoor network killer network card. For some reason it blocked my localhost.
To fix this I had to start a cmd window and navigate to C:\Program Files\Bigfoot Networks\Killer Network Manager\