About Error Code: ST-3100001

We have received reports that error code 'ST-3100001' appears while playing ACE COMBAT ONLINE, preventing players from continuing the game.

This error code appears when communication with the game server is lost.

Please check the following settings:

・ Synchronizing the time on Windows.

Please check to see if there is a time discrepancy, synchronize the time on Windows, and then test the game again.

We apologize for the inconvenience and appreciate your cooperation.

The ACE COMBAT Team