When trying to call the endpoint url provided in DXAPI to get case details by providing the case id as parameter, we are getting below err

com.pega.pegarules.pub.services.OutboundMappingException: Caught Exception while creating OAuth2 client

or.

api service package is changed the authentication to OAuth2.0

able to access apis from postman using OAuth2.0 

but when trying to access the same API from connect-rest with sameOAuth2.0 authentication profile, we are getting the error 

com.pega.pegarules.pub.services.OutboundMappingException: Caught Exception while creating OAuth2 client