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."
}
```

Start with Template Two at the linked S3 URL and inspect the Lambda function package references, especially the LambdaMobileSearchS3Key, LambdaNotesApiS3Key, and LambdaDynamoStreamsS3Key values. Verify whether the referenced objects exist in the configured bucket and determine why CloudFormation reports NoSuchKey; done means the template can create the stack in US East without these errors.

Written by the indexing model from the issue text.