NotFoundError: Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node. #8820
Description
Error
Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.
Stack trace
s
div
../node_modules/react-i18next/dist/es/Trans.js:6 in Trans
div
../app/javascript/components/student/mentoring-session/SessionInfo.tsx:12 in SessionInfo
header
div
div
../app/javascript/components/common/SplitPane.tsx:12 in SplitPane
div
Tracking Details
- Project: exercism-js
- Sentry: NotFoundError: Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.
- Culprit: Wj(react-dom/cjs/react-dom.production)
- First seen: Mar 2, 2026