Unrecognised Game Client?

[Televerket]

So I've been making a map in the FC5 level editor which I published and want to share with my friends.
When I try to launch the game, I now get an error that states "Launch Error: Unrecognised Game Client. Cannot Continue"
Am I the only one with this error?

[UbiBaron]

I'm sorry to hear that this is occurring.

If you haven't already, please try verifying the game files. This will check for missing or corrupt files and replace them, which you can do through the steps here

- Ubisoft Support