The 0xE000078B error code means OneNote is having trouble communicating with the web server where your notebook is stored. Most likely, because there’s been a server timeout, which occurs when the server is busy and can’t respond to your requests. Step By Step Procedure For How To Fix Error 0xE00078B: 1. Conflicts With Antivirus and Firewall: Check … Continue reading “How To Fix Error 0xE000078B?”