I delete the first game deployed, and the new game is deployed successfully. But I don't know the reason.
You can see the error in more details by going into AWS Console and selecting CloudFormation service. Under there you should be able to see the CloudFormation stack generated by our game. Select the stack, go into events to see what was the actual error message. For example you might have face issues with Services Quotas preventing you from launching new fleet of servers.
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