Error: La

## Error

```
La
```

## Stack trace

```
/users:462
/users:194 in Ui
/users:195
```

## Tracking Details
- **Project**: exercism-js
- **Sentry**: [Error: La](https://thalamus-ai.sentry.io/issues/146788583/)
- **Culprit**: ?(users)
- **First seen:** Sep 13, 2026

Start with the Sentry issue and the reported stack locations `/users:462`, `/users:194 in Ui`, and `/users:195`. Reproduce or inspect the error in the users flow, then identify the cause of the `La` error and add a focused regression test before confirming the Sentry failure no longer occurs.

Written by the indexing model from the issue text.