The best and most readily applicable fix currently circulating in the community is that players can obtain the missing Battle Pass token by restarting the game. After restarting Modern Warfare 2
Click on Advanced Tab. Click on Test. If there is no audio. Change the format by clicking on the drop-down and selecting a different frequency. Click on Test again. Choose the one that works. You can also click on the option Set Default to change that playback device to your default device. If the problem is only with your headphone, then make .