It sounds like there may be a technical issue with the Teams app. Here are a few steps you can try to troubleshoot the issue:
- Check if the co-organizer is signed in to the Teams app using the same account they were assigned as co-organizer.
- Make sure the co-organizer has the latest version of the Teams app installed.
- Try removing the co-organizer from the meeting and then re-adding them as a co-organizer.
- If none of the above steps work, try uninstalling and then reinstalling the Teams app.
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