@rsram312  Yes, we found the issue.  In the ACL's there is a condition as "Active = true".  
As a normal ITIL user, when you submit a request to create the Change Req. or Change Task. This "Active = true" field value is not setting automatically. 

Solution Proposed:  

1. Adjust your ACL's to bypass this condition based on Active field. 

OR 

2.  Add "active: true" in the request Payload whenever you send the request.