hello, We’re continuously releasing product updates that fix issues and improve your syncing experience in OneNote, so it’s a good idea to keep your copy of OneNote up-to-date. Our product updates are free to download and use. Before you try the troubleshooting suggestions in this article, we recommend following the steps in Install Office updates to install the latest OneNote updates on your PC. If you’re on a Mac, follow the steps in Check for Office for Mac updates automatically. If you’re still experiencing sync problems after updating OneNote, click on the sync issue that best describes the issue you’re seeing, or scroll to the end of this article to report your sync issue to the OneNote product team.

Note: The OneNote Diagnostics Tool is currently only available in English. We’ll update this page when additional languages become available.

Hello Abu -Bakr Nuri,

Assalam walekum warahmatullah barkataho,

When there is an 'unexpected error', logging out of the account of firefox:

You could give this a try : -

3-bar menu => Options => Sync - Open Sync and remove account - Close and open Firefox - 3-bar menu => Options => Sync : and sign back in.

note: Also Clear cookies.

I hope your Problem is resolve [God willing].

Thank you!

Asalamualkium, Brother Arman,

It did not work. Anything else?

Hi Abu-Bakr Nuri, glad to see you on Mozilla Support Forum.

Try Clearing Cookies and Sites Data.

• Click the menu button. and select Options. Preferences.
• Select the Privacy & Security panel and go to the Cookies and Site Data section.
• Click the Clear Data… button. The Clear Data dialog will appear. ...
• Click Clear.

If it doesn't solved your problem, then feel free to ask in Reply Section. Thanks for raising your question in Mozilla Support Forum.

Nope, still the same error. Anything else?

hello abu bakra ,

Insha Allah now resolve your problem ,

please follow the step:

1.Uninstall and 2.reinstall Firefox:

• goto home screen on your computer.

• press -windows+R

• open dialog box type control panel then press enter.

• click uninstall program.

• display all software which is install by you!

• right click on Mozilla firefox then click unsiltall.

2. install Firefox

• Visit this Firefox download page in any browser, such as Microsoft Internet Explorer.
• Click the Download Now button. The Firefox Installer that downloads will automatically offer you the best available version of Firefox for your computer.

• If you use Microsoft Internet Explorer, a notification bar will appear at the bottom of the page with the options to run the installer or save the file to your computer. Click Run to start the process.

• In other browsers, you may need to first save the Firefox installer to your computer, then open the file you downloaded.

Then easy login firefox account

I hope resolve your problem please reply me back.

thank you!