TypeError: Cannot read properties of undefined (reading 'timelineTime') #8681
Description
Error
Cannot read properties of undefined (reading 'timelineTime')
Stack trace
../app/javascript/components/bootcamp/JikiscriptExercisePage/Scrubber/useScrubber.ts:194 in moveToFrame
../app/javascript/components/bootcamp/JikiscriptExercisePage/Scrubber/useScrubber.ts:281 in <anonymous>
../node_modules/@sentry/browser/src/helpers.ts:117 in sentryWrapped
Tracking Details
- Project: exercism-js
- Sentry: TypeError: Cannot read properties of undefined (reading 'timelineTime')
- Culprit: moveToFrame(app/javascript/components/bootcamp/JikiscriptExercisePage/Scrubber/useScrubber)
- First seen: Feb 10, 2026