Open the game wait until closes, open a notepad or something that allow you to save text
right click paste, you should now have all info of the error
So for anyone having this problem, I found the solution. Restart your router.
@Alamar We are not ignoring this issue, but we are still working on it; it appears to be an Unreal Engine 4 issue. If the Dx9 workaround will help players until it is fixed, that’s what we’ll recommend doing.