I am trying to integrate Dynamcis 365 with K2 WF and i am using VS2015 as the WF designer. I am trying to make use of the Item Reference Event and i select CRM Entity Reference and click next, it prepopulates the CRM setting but i am unable to proceed further and it throws the attached error

Connection failed: Client found response content type of 'text/html', but expected 'text/xml' . The request failed  with error message.