VSTO Add-in may fail to load if signed by some SHA256 certificates [Update : Fixed with latest VSTO runtime]

Symptom VSTO add-in may fail to load if all of the following conditions are true:- The SHA256 certificate used to sign the add-in is based on SHA256 algorithm (http://www.w3.org/2000/09/xmldsig#rsa-sha256) “Require Add-ins to be signed by Trusted publisher” setting is checked in Office Trust Center. The deployment manifest is not accessible (For e.g. you installed the VSTO…