Hi @pu rechard,
This issue could be caused by a network connection problem, an incorrectly configured default email program, or an Office installation problem. Please follow the steps below to troubleshoot the issue:
- Check your network connection to ensure that the computer is connected to the Internet.
- Check your default Email app is correctly configured. Go to Settings >> Default apps >> Email. Ensure that the default Email app is set to Mail or Outlook.
- Repair OneNote if the issue persists.
Please let me know if there is any step works in this case or you still need assistance.
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