CREATE_FAILED in APIGatewayServiceLambda process

[TLTechSmart]

Whilst trying to follow the 'Call an AWS Serverless Service from an Alexa Skill' tutorial I get the following error when I try to create the stack:

"Resource handler returned message: "Error occurred while GetObject. S3 Error Code: NoSuchBucket. S3 Error Message: The specified bucket does not exist (Service: Lambda, Status Code: 400, Request ID: 6f03ffda-f601-40a4-8a2c-1ffb50aaf6b0, Extended Request ID: null)" (RequestToken: b7fcc3f4-301a-e91b-bd3b-42bac5446fb8, HandlerErrorCode: InvalidRequest)"

I have tried as both my IAM user and as the root user.

I am in the eu-west-1 (ireland) region, but I have also tried it in the us-east-1 (virginia) region, both have the same result.

I have attached my template.yml file in a zip.

template.zip
.