Steam

- Launch Steam

- From the 'Library' section, right-click on the game and select 'Properties' from the menu.

- Select the 'Local Files' tab and click the 'Verify Integrity of Game Files' button.

- Steam will verify the game's files - this process may take several minutes. This will always download a number of files even if you've just verified.

- Once the process is completed, close the windows then launch the game.

Epic

- Open the Epic Launcher

- Navigate to Football Manager 2021 via your ‘Library’ and click on the three dots to bring up a drop-down menu

- Once open, click Verify

- Epic will verify the game's files - this process may take several minutes. This will always download a number of files even if you've just verified.

- Once the process is completed, close the windows then launch the game.