A family of Microsoft products that enable users to capture, organize, and reuse notes electronically
Hi DaniloBrandileone Scardua,
Thanks for posting the query in our forum.
The error code 0xE000078D means that your OneNote is having issues communicating with the web server where your notebook is stored. That being said, we advise checking the Service health status to identify if there are server issues. If none, we suggest that you follow the troubleshooting steps found in this article.
In addition, you can check the information posted in this article about Resolve the 0xE0000007 error ("We ran into a problem syncing your notebook") in OneNote.
Hope there information help you. In case you need further assistance, don't hesitate to post back.
Regards,
Clark