Hi, I have a task form which works fine in Portal. But does not open in Tem

Hi,
I have a task form which works fine in Portal. But does not open in Tempo after accepting it. (I have selected tempo check-box in form designer mode).
It throws an error - "The Requested Task is not available" .It may have been deleted or completed by anoter assignee

This works fine in one environment but fails in another. i am using Version 7.3
Attaching is the error message screen-shot for your reference.

Is it something related to configuration issue? please suggest....

OriginalPostID-107084

OriginalPostID-107084