Please follow the steps below.
■ Blackscreen issue on PC launcher.
1. Go to Official Homepage (https://cryptoconflict.joycity.com/)
2. Download PC launcher.
3. Install the PC launcer and game. (Even if you installled previous PC version, please reinstall the launcher provided from the official page.)
4. Uninstall the Installed PC launcher and game.
5. Re-install the PC launcher, game and play.
If you fail to fix your issue after following the steps below, please send us a ticket with issue details, screenshots, and OS info.