It seems that your OneNote notebook is currently in offline mode, which can happen if the app has not synced properly with OneDrive due to inconsistent Wi-Fi connectivity. Here are some steps you can take to resolve this issue:
- Check Your Internet Connection: Ensure that you have a stable internet connection at your school. If the Wi-Fi is still inconsistent, try switching to a different network if possible.
- Sync Your Notebook: In OneNote, try to manually sync your notebook. You can do this by tapping on the notebook name and selecting the option to sync. If you see a sync status icon, wait for it to indicate that the sync is complete.
- Sign Out and Sign In Again: Since you've already tried signing out and back in, ensure that you are using the correct account associated with your OneDrive.
- Check OneDrive: Log into your OneDrive account through a web browser to see if your notes have been uploaded. Sometimes, the sync might take a while, so give it some time.
- Use OneNote on Another Device: If you have access to another device with OneNote installed, check if your notes are available there after signing in with the same account.
- Reset OneNote: If the issue persists, you might consider resetting the app again, but ensure you have saved any unsynced notes elsewhere, as this might lead to data loss.
If none of these steps work, you may need to contact Microsoft support for further assistance.
References: