AWS Parallel cluster API error

Hi,

I tried to create pcluster API using "AWS Doc: https://docs.aws.amazon.com/parallelcluster/latest/ug/tutorials_06_API_use.html.

But im getting error when i try to POST or PUT methods from apigateway.

{ "message": "Bad Request: Configuration must be a valid YAML document" } I have created a pcluster API as mentioned in the aws docs. When i run this from cli it works. When i try to run from API gateway or postman im getting error. Please advise how to fix this issue.

Thanks!