Include as much detail as possible about when the error is happening, along with a DxDiag and crash logs. If the error message continues to occur after trying these troubleshooting steps, then please Submit a request to our Support team. 🛠 If you are running the Windows ‘N’ or ‘KN’ version of Windows 10, install the Media Features Pack. While you may be on an up-to-date version of the OS, there may be essential application updates waiting to install. Be sure to restart your device after installing any updates.

Verify that there are not any pending Windows updates. The minimum system requirements can be found here. 🛠 Make sure the computer meets the game's minimum system requirements. Make sure the game is whitelisted so it doesn’t get blocked in the matchmaking lobby. A: Aoe3 comes from a period where games didnt receive lots of mod support. 🛠 Make sure your local or campus firewall is not blocking connections. If an update was released recently, you will need to be on the latest build to play with the rest of the community. 🛠 Make sure you are on the latest game build. In your game options, select the Game tab and make sure that the Enable Crossplay box is checked for both players. Notifications for server maintenance will appear in game as well as on our social channels. 🛠 Check if server maintenance is happening. Please work through the following steps to see if they fix the problem:

Server certificate authentication failed.

Sorry, failed to connect to multiplayer services.

That’s it you’re ready to play Open Steam. If you are unable to launch the game after downloading the update, make sure you add (or re-add) the Age of Empires III: Definitive Edition client or folder as an exception to your firewall and antivirus program.

Sorry, failed to connect to multiplayer services. The title screen should show you on Build 4087.

The error codes that include 0xfffffff as part of the message are generally related to connection issues.

Failed to join game aoe3