Error: Ea

## Error

```
Ea
```

## Stack trace

```
/user_onboarding:458
/user_onboarding:194 in Ji
/user_onboarding:195
```

## Tracking Details
- **Project**: exercism-js
- **Sentry**: [Error: Ea](https://thalamus-ai.sentry.io/issues/143989652/)
- **Culprit**: ?(user_onboarding)
- **First seen:** Aug 31, 2026

Start with the linked Sentry event and the /user_onboarding stack entries at lines 458, 194, and 195. Determine what the opaque “Ea” error represents and establish a reproducible cause; the issue is done when the cause is fixed and the error no longer occurs.

Written by the indexing model from the issue text.