我正在尝试将CloudFormation用于WordPress网站。我正在使用AWS提供的模板和我遇到错误的方式的3/4，这将终止该过程：
12:39:17 UTC-0400 ROLLBACK_IN_PROGRESS AWS::CloudFormation::Stack MyProdWPSite The following resource(s) failed to create: [WebServerGroup]. . Rollback requested by user.
Physical ID:arn:aws:cloudformation:us-west-2:085664598559:stack/MyProdWPSite/955a5660-6b0a-11e7-a813-503aca41a061
Client Request Token:Console-CreateStack-6768960d-41f1-4d9b-b641-b8220af0e895
12:39:16 UTC-0400 CREATE_FAILED AWS::AutoScaling::AutoScalingGroup WebServerGroup Received 0 SUCCESS signal(s) out of 1. Unable to satisfy 100% MinSuccessfulInstancesPercent requirement
Physical ID:MyProdWPSite-WebServerGroup-1DXD0NN8C0R00
Client Request Token:Console-CreateStack-6768960d-41f1-4d9b-b641-b8220af0e895
我该如何解决这个问题？