Error 400 on Aggregate

I am getting the same error, can somebody plz tell me how to resolve this issue?

Thanks.

@Nikhil_Nikam, it's unlikely you are running into the same error, so I've moved your message to it's now topic.

Ccan you answer these questions?

  1. What ODK tool and version are you using? And on what device and operating system version?
  2. What steps can we take to reproduce the problem?
  3. What you have you tried to fix the problem?
  4. Anything else we should know or have? If you have a test form or screenshots or logs, please attach.