Well, I just got this game yesterday, and Galactic War is pretty fun. But today, I decided to try multiplayer, so I joined a match, clicked ready, and then I got a black screen. I could still see some GUI, and the music would be playing, but a few seconds later, I would get the message: "PA.exe has stopped working.". I really need some help (my graphics card is an Intel HD Graphics 4400 V. 10.18.10.3496, and I have an i5 processor).
Try hitting F5 when you get the black screen. It will reload and often solve the black screen bug right afther starting. Not guaranteed to fix the "PA stopped working part of the problem thouhg"