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."
}
```

Beginne mit Template Two unter der verknüpften S3-URL und prüfe die Verweise auf die Lambda-Funktionspakete, insbesondere die Werte LambdaMobileSearchS3Key, LambdaNotesApiS3Key und LambdaDynamoStreamsS3Key. Verifiziere, ob die referenzierten Objekte im konfigurierten Bucket vorhanden sind, und ermittle, warum CloudFormation NoSuchKey meldet; abgeschlossen ist die Aufgabe, wenn das Template den Stack in US East ohne diese Fehler erstellen kann.

Vom Indexierungsmodell aus dem Issue-Text verfasst.