ADF DataFlow Debug Error

[Namrata1704]

I have been to useingADF dataflow to transform file from one datalake to another datalake. But when I debug the pipeline, I get error as below:

{
"error": {
"code": 400,
"message": "java.lang.Exception: DataFlowManagerClient.getPayload: 400, resolvedContent: Some(HttpResponseProxy{HTTP/1.1 400 Bad Request [Cache-Control: no-cache, Pragma: no-cache, Content-Type: application/json; charset=utf-8, Expires: -1, X-Frame-Options: SAMEORIGIN, Strict-Transport-Security: max-age=15724800; includeSubDomains, X-Content-Type-Options: nosniff, Date: Tue, 20 Aug 2019 15:30:19 GMT, Content-Length: 2137] ResponseEntityProxy{[Content-Type: application/json; charset=utf-8,Content-Length: 2137,Chunked: false]}})"
},

And also I get error if i do data preview while creating dataflow pipelines as below:
"Input is malformed. Reason: Could not get entity details for Curated" (Curated is the name of datalake).
I have tested all the connection and everything is fine but still the pipeline fails.

Can you please have a look into it