The value of the property ‘type’ cannot be parsed”

Symptoms:

During the vsto installation you receive this error message

Cause

A corrupted or out of date VSTOInstaller.exe.config file

Answer

Locate the VSTOInstaller.exe.config file and rename it with suffix.old

This file is located in

C:\Program Files (x86)\Common Files\microsoft shared\VSTO\10.0

Then try the installation again

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