The problem usually occurs when the patch client. To combat to go before you do the following:
You go to the folder Z8Games Crossfire> and you can try this:
Deletes the folder and start with the Crossfire version.ini "patcher_cf" possibly as an administrator.
You can also Crossfire and again can be corrected at some point, then there is the error and repair it as normal. But with the way it should work.
THIS IS WORKING 100%