, you must add an exception:
The SteamworksMfx error generally points to one of three culprits: a corrupted game file, an outdated Steam client, or security software over-zealously "quarantining" a vital game component. Because Steamworks is the bridge between your local hardware and Steam’s servers, any tiny crack in that bridge causes the game to crash or refuse to launch. Step 1: Verify Integrity of Game Files steamworksmfx error fix