FindRibbons task failed unexpectedly when building addin for Outlook 2010

Question

We\'re building an Outlook 2010 plugin using VS2013, .NET4, Microsoft Async and BCL Portability (from Nuget) and encountering build errors similar to this question and this

Answer 1

I had the same issue when upgrading my Visual Studio 2010 VSTO projects to Visual Studio 2013. The way I fix the issue was with a combination of two things:

First I removed the reference to the assembly attribute SecurityTransparent from my AssemblyInfo.vb

<Assembly: SecurityTransparent()>

Second I set Copy Local = true on the Microsoft.Office.Tools.Common.v4.0.Utilities reference.

Answer 2

I was able to fix this error by adding explicit assembly version references in my .csproj. See https://stackoverflow.com/a/29095545/4679952 for details.

Answer 3

You need to remove the SecurityTransparent attribute from the end of the AssemblyInfo.cs file.