I’m working with an Aggregate API configuration. I have defined query parameters oc and cid in my API definition, but when I make requests, these parameters seem to be empty or not populated correctly. This issue leads to errors like INCOMPATIBLE_PARAMETERS_ERROR and NumberFormatException.

I want to integrate an API in WSO2 EI6.6.0 where the downstream API only accepts HTTP method GET with JSON Request body but as per WSO2 EI, it ignores the JSON request being set using the payload factory which is why the downstream gives an error. below is my code