I've had this issue multiple times.
Okay, here are your steps.
1. Uninstall Crossfire.
2. Delete all the Z8 Files.
You can find the files at your local disk (C: ) or (D: )/ -> Program Files (x64) or (x84) -> Z8Games Folder. = Delete.
3. Restart your PC.
4. Install Crossfire again.
5. Wait for the patch to load.
6. Play the game.
Profit ??