addin option on the developer tab - the following error shows up -

Window Title: Microsoft Office Customization Installer

Message: Updating Office customization. There was an error during installation.

Details:

Name: Magnimetrics Tools for Excel

From: Magnimetrics Tools for Excel

Exception reading manifest from app.magnimetrics.com: the manifest may not be valid or the file could not be opened.

This error message indicates that there was an issue during the installation of “Magnimetrics Tools for Excel”. The problem seems to be related to reading the manifest from a specific URL, suggesting that either the file could not be opened or it may not be valid. Please check the source URL or contact the software provider for further assistance.