There really is no way to help you with that amount of information, so I'll ask for some basic information regarding the issue.
OS?
CPU?
How did you install the game?
At what point does it give that message?
Can you provide a screenshot of that message?
If it is for the launcher:
Did you talk in game while this was happening? If so, can you go into your logs folder and open the file for the day it happened and post chat logs of when it happened, so that timestamps are shown?