Outage in OpenSesame

TED courses are not launching

Resolved Major

January 19, 2026 - Started 4 days ago - Lasted about 14 hours
Official incident page

Incident Report

We are investigating an issue preventing learners from launching TED courses. Affected users may encounter an error message stating that the video is not loading when launching a Simon TED course. Our engineering team is actively working to resolve this issue. We apologize for any inconvenience. Please reach out to our support team with any questions or concerns.

Components affected

OpenSesame Course Delivery Platform OpenSesame Simon Learner Experience

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Latest Updates ( sorted recent to last )

RESOLVED 3 days ago - at 01/20/2026 05:38AM

TED has informed us that the source of the issue has been identified and fixed. We are able to confirm that videos are now loading properly in TED courses.

INVESTIGATING 4 days ago - at 01/19/2026 07:07PM

We continue to investigate the issue with TED courses not launching.

We apologize for any inconvenience. Please reach out to our support team with any questions or concerns.

INVESTIGATING 4 days ago - at 01/19/2026 03:45PM

We are investigating an issue preventing learners from launching TED courses. Affected users may encounter an error message stating that the video is not loading when launching a Simon TED course. Our engineering team is actively working to resolve this issue.

We apologize for any inconvenience. Please reach out to our support team with any questions or concerns.

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