The errors in question are related to the Windows search bar in the start menu not working and some universal Windows apps not working properly. Accordingly, due to errors affecting many Windows users, Office, Outlook and Outlook Calendar applications cannot be clicked with the search bar or they do not work even if clicked.
Sourced from Windows shell and Office APIs
Microsoft states that the problems experienced in operating systems are caused by the Windows shell and Office APIs. So much so that the Windows operating system; Microsoft Office can generate corrupt registry keys that can affect applications that use Microsoft Office APIs to integrate with Microsoft Outlook or Outlook Calendar. This causes applications and Windows components to become unresponsive.
Solution: “Delete apps”