From bleepingcomputer.com
After releasing the first Microsoft Office updates of 2019 designed to fix non-security issues in Office 2010, Office 2013, and Office 2016 on January 2, Microsoft pulled the Office 2010 updates from the server following multiple reports of Excel not being able to start.
More specifically, Redmond had to remove four Microsoft updates that were designed to make changes in its Office suite to enable the new era Japanese calendar.