Battle.net app is just showing a black screen

@Killer:

The topic you are replying to is 2 years old; worse, the problem is entirely different.

This forum is to provide technical support for issues on the Battle.Net Desktop App; issues with specific games need to be reported in that game’s forum.

For the issue you describe… you will need to contact Activision Support; see this post pinned at the top of this forum: Having Problems with Call of Duty? Read this first!