Python Solution Fails to Send Metrics when Deployed using a Nested Stack

[philipakash]

An error occurred (ValidationError) when calling the DescribeStacks operation: Stack with id `XXXXXXXXX` does not exist: ClientError
Traceback (most recent call last):
File "/var/task/vpn-monitor.py", line 70, in lambda_handler
response = cf.describe_stacks(StackName=stack_name)
File "/var/runtime/botocore/client.py", line 314, in _api_call
return self._make_api_call(operation_name, kwargs)
File "/var/runtime/botocore/client.py", line 612, in _make_api_call
raise error_class(parsed_response, operation_name)
ClientError: An error occurred (ValidationError) when calling the DescribeStacks operation: Stack with id `XXXXXXXXXXXX` does not exist

The above log shows the error when it tries to describe the child stack.