Kameleon incident
Microsoft Office Update Issue Affecting Taskpane Add-ins
Kameleon experienced a minor incident on September 12, 2025 affecting Office add-in, lasting 47d 5h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Sep 12, 2025, 07:08 AM UTC
A recent update to Microsoft Office (version 2507) has introduced a compatibility issue that affects taskpane JavaScript add-ins. This is not a bug in our product, but a known issue in Microsoft’s Office platform. You can follow the official tracking here: https://github.com/OfficeDev/office-js/issues/5979. Error: - Admin managed Add-in fail to load after Office upgrade with "You don't have permission to use this add-in" How to Resolve: To fix the issue, users should clear the Office cache using Microsoft’s recommended method: https://learn.microsoft.com/en-us/office/dev/add-ins/testing/clear-cache#automatically-clear-the-cache After clearing the cache, restart the Office application and try again. Additional Notes: - This issue is under investigation by Microsoft. - We will update this page as soon as a fix is released. - No changes have been made to our add-in or deployment process.
- identified Sep 18, 2025, 09:44 AM UTC
Microsoft is actively investigating this as a high-priority issue. A fix is in progress, and updates will be shared as they become available. In the meantime, please use the provided workaround
- monitoring Oct 21, 2025, 05:27 AM UTC
We’ve received a message from Microsoft indicating that the issue has been resolved across all affected versions: - Versions 2506/2507: Fix applied on October 14 - Version 2508: Fix applied on October 7 - Versions 2509 and above: Fix included in initial release
- resolved Oct 29, 2025, 06:18 PM UTC
This incident has been resolved.