Error messages [CAUSES AND FIX]

We are all familiar with error messages players get.
Here, we will make a list of error messages and guide to fixing:

• Server currently down for maintenance. Please try again later.

Problem: There is a maintenance going on, or you haven't turned your Data/Wi-Fi network.

Fix: First of all, check AoE:CS Annoucements to see is there any planned maintenance. If there isn't any maintenance planned for time when you are playing game, check if you are connected to Data/Wi-Fi network. If you are properly connected to Internet, but still cannot log in to the game, contact Microsoft support.

• You need to sign in to play Age of Empires:Castle Siege.

Problem: You are not logged in to your Microsoft account.

Fix: Go to login.live.com, sign in to MS account associated with your game. After signing in, wait about 1 minute and enter the game again.

• Failed to connect to server. Please try again.

Problem: Unknown

Fix: Wait 30mins up to 9 hours. This rarely helps, because source of the problem is unknown. You should also try to reset your Wi-Fi router or data connection.

• Error encountered connecting to server.

Problem: Misunderstanding between game and server.

Fix: Reload the game. If it doesn't help, wait 30mins-9hrs.

• Sorry, but we cannot sign you in to your Xbox account. (not exact message)

Problem: Problem with Xbox server.

Fix: Wait from 30mins to 9hrs. If it doesn't help, try to log out, and then again in to your Xbox account.

• A checksum error encountered while issuing battle/build command

Problem: Partly incompatibility of the game with current OS (mostly happening on Windows 10).
Fix: For now, only solution is rolling back to Windows Phone 8.1.

These methods helped us fix our in-game problems.

If it doesn't help you, we suggest you to contact developers or Xbox Support:

Age of Empires Community

Xbox Live Support