Elastic Beanstalk部署CloudWatchMonitoringScripts-1.2.1.zip时失败，出现403错误。

【以下的问题经过翻译处理】 我尝试将CloudWatchMonitoringScripts-1.2.1.zip部署到我们的两个 Elastic Beanstalk 环境，但是在两个环境上都看到了相同的错误信息：

Command failed on instance. Return code: 1 Output:  Failed to retrieve http://aws-cloudwatch.s3.amazonaws.com/downloads/CloudWatchMonitoringScripts-1.2.1.zip: HTTP Error 403 : <?xml version="1.0" encoding="UTF-8"?>. EBExtension failed. For more detail, check /var/log/eb-activity.log using console or EB CLI.

我无法在浏览器中下载 CloudWatchMonitoringScripts-1.2.1.zip：

<Error>
<Code>AccessDenied</Code>
<Message>Access Denied</Message>
<RequestId>SV3EXS944RMSWXYG</RequestId>
<HostId>EOZ/h8Ch09luQ89e75FfHItOwkBbkD6naSo7xDQC+bXCACM89oZzWjzoSsecDfditFOHd0mTcHTCxL+rSBLYiA==</HostId>
</Error>