Retrieve Task List or Process List - REST API 4.0 - OIC

Summary

Hello Everyone, I'm seeing an issue while trying to retrieve tasks through Retrieve Task List API 4.0(GET - /bpm/api/4.0/tasks). The same issue even applicable for retrieving process instance list.

Content

Please find the image, which is showing item list as empty. But the tasks I could see in task console, which is not  reflecting through API.

Have tried to give product version 3.0 instead of 4.0 and the result is same.

Have tried other APIs of manage tasks/processes, which are working perfectly. 

• Manage Process
  • Retrieve a Process Instance – GET - /bpm/api/4.0/processes/{processId}
  • Add Comment to the Process – POST - /bpm/api/4.0/processes/{processId}/comments