stall_index field: Error message is not useful

[GlendaChong]

The error message does not tell the user why the index provided is invalid. Should provide a reason, that it's because the index is out of bounds, or greater than the number of stalls in teh list.

[soc-se-bot]

Team's Response

We agree that the message can be more specific, but this issue should be of a low severity.

Items for the Tester to Verify

:question: Issue severity

Team chose [severity.Low] Originally [severity.Medium]

• [ ] I disagree

Reason for disagreement: [replace this with your explanation]

---