lambda handler: KeyError ['params'] in Create dataset step of AWS SNS

[agarwalanant]

While trying to deploy my forecast project in the retail domain I got the following error in the 'create dataset' step function when I start executing it.

KeyError: 'params'Traceback (most recent call last):  File "/var/task/dataset.py", line 12, in lambda_handler    datasets = event['params']['Datasets']	[ERROR] KeyError: 'params' Traceback (most recent call last):   File "/var/task/dataset.py", line 12, in lambda_handler     datasets = event['params']['Datasets']

I have uploaded the training dataset into S3 and it looks likes below:

As the training file is available in the specified S3 bucket mention at stack the event must be created, I am not able to find the root cause of the error.
Also attaching my params.json as a txt file.
params.txt

Please help me out....