Open your antivirus "Protection History" or "Quarantine" section. Look for steam_api64.dll .
Because is a highly demanding 64-bit application, it requires the 64-bit version of this bridge ( steam_api64.dll ) to run. If this file is corrupt, misplaced, or entirely missing, the game cannot check in with Steam and will crash before it even displays a loading screen. Why Does the Error Happen? call of duty infinite warfare steamapi64rdll missing work