Unable to Create AWS CloudFormation Stack with Template Two

The example doesn't generate Cloud Formation Stack and give the errors described below :
(Thank for the response in advance)

Location : US East
Template Two : https://s3.amazonaws.com/awslambda-reference-architectures/mobile-backend/lambdafunctions.template

Reported Errors : LambdaDynamoStreamsApiFunction Error occurred while getting the object from S3. S3 Error Code: NoSuchKey. S3 Error Message: The specified key does not exist.

LambdaMobileSearchApiFunction Error occurred while getting the object from S3. S3 Error Code: NoSuchKey. S3 Error Message: The specified key does not exist.

LambdaMobileCoreApiFunction Error occurred while getting the object from S3. S3 Error Code: NoSuchKey. S3 Error Message: The specified key does not exist.

Used Keys :
"LambdaSourceBucket": {
"Type": "String",
"Description": "Name of S3 bucket where Lambda function packages are stored.",
"Default": "awslambda-reference-architectures"
},

```
"LambdaMobileSearchS3Key": {
"Type": "String",
"Default": "mobile-backend/cloudsearchapi.zip",
"Description": "Name of S3 key for ZIP with Lambda function package for querying CloudSearch."
},
"LambdaNotesApiS3Key": {
"Type": "String",
"Default": "mobile-backend/photonotesapi.zip",
"Description": "Name of S3 key for ZIP with Lambda function package for sending mobile data to DDB."
},
"LambdaDynamoStreamsS3Key": {
"Type": "String",
"Default": "mobile-backend/searchstreams.zip",
"Description": "Name of S3 key for ZIP with Lambda function package for sending data to CloudSearch."
}
```

从链接的 S3 URL 中的 Template Two 开始，检查 Lambda 函数包引用，尤其是 LambdaMobileSearchS3Key、LambdaNotesApiS3Key 和 LambdaDynamoStreamsS3Key 的值。验证所引用的对象是否存在于已配置的 bucket 中，并确定 CloudFormation 报告 NoSuchKey 的原因；完成的标准是 template 可以在 US East 中创建 stack，且不会出现这些错误。

由索引模型根据 Issue 内容生成。