DataPrep connectivity issue with Composer

[Ashish_Nagdev]

I am trying to schedule a data prep flow using composer. I have provided recipe_id/output_id and token_bearer. However I am getting following error-

{    "name": "DataNotFoundException",

  "message": "Requested data was not found",

  "details": "This dataset could not be found."

 }

Can someone help on this?