After installing the November 12, 2024 Microsoft Office update for Excel 2016, Excel was not able to locate the Smart View HsTbar.xla file upon startup. The issue is described in Excel 2016 stopped loading .xlam Excel Addins after security update from 12-nov-2024.

This issue is fixed by Microsoft in November 19, 2024, update for Excel 2016 (KB4484305). If you are using Excel 2016, Oracle advises that you download and install this fix.