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Outlook Plugin Installation Error - The Value of the property 'type' cannot be parsed

Last Updated: Jan 28, 2015 12:13PM EST
During installation of the Less Meeting Outlook Plugin you may receive the following error.

The value of the property 'type' cannot be parsed. The error is: Could not load file or assembly 'Microsoft.Office.BusinessApplications.Fba,Version=, Culture=neutral, PublicKeyToken...

How to fix the "Value of the property 'type' cannot be parsed" error

This error happens when there is a corrupt VSTO file already present in your system, possibly from another Outlook plugin.

To allow the Outlook installation you will need to delete this file. Note - You may want to keep a backup copy of the file for future needs.

  1. Open Windows Explorer
  2. Visit the exact file path described in your error message (e.g. C:\Program Files\Common Files\Microsoft Shared\VSTO\10.0
  3. Locate the file named VSTOInstaller.exe.Config
  4. Delete this file
  5. Now you will be able to install the plugin
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