NotFoundError: The object can not be found here.

## Error

```
The object can not be found here.
```

## Stack trace

```
../app/javascript/components/editor/testComponents/TestRunSummary.tsx:89 in TestRunSummaryStatus
../app/javascript/components/editor/testComponents/TestRunSummary.tsx:102 in TestRunSummaryHeader
../app/javascript/components/editor/testComponents/TestRunSummary.tsx:27 in TestRunSummary
../app/javascript/components/editor/testComponents/TestRunSummaryContainer.tsx:11 in TestRunSummaryContainer
../app/javascript/components/common/Tab.tsx:58 in TabPanel
../app/javascript/components/editor/panels/ResultsPanel.tsx:28 in ResultsPanel
../app/javascript/components/common/SplitPane.tsx:28 in SplitPane
../app/javascript/components/Editor.tsx:94 in Editor_default
../node_modules/@sentry/react/src/errorboundary.tsx:101 in new ErrorBoundary
../node_modules/@tanstack/react-query/src/QueryClientProvider.tsx:30 in QueryClientProvider
```

## Tracking Details
- **Project**: exercism-js
- **Sentry**: [NotFoundError: The object can not be found here.](https://thalamus-ai.sentry.io/issues/129988849/)
- **Culprit**: removeChild([native code])
- **First seen:** Jun 24, 2026

Start with app/javascript/components/editor/testComponents/TestRunSummary.tsx, especially lines 89 and 102, and trace the removeChild([native code]) error using the linked Sentry report. Done means identifying the cause of the NotFoundError and confirming that the TestRunSummary view no longer produces it.

Written by the indexing model from the issue text.