VSIX Installer: SignatureDescription could not be created for the signature algorithm supplied

Question

Unable to install Productivity Power Tools Extension for Visual Studio Professional 2015 RC

1. Visual Studio IDE, Tools > Extensions and Updates > Online > Visual Studio gallery
2. visualstudiogallery.msdn.microsoft.com site.

Install Log

2015-07-22 8:22:27 AM - Microsoft VSIX Installer
2015-07-22 8:22:27 AM - -------------------------------------------
2015-07-22 8:22:27 AM - Initializing Install...
2015-07-22 8:22:28 AM - Extension Details...
2015-07-22 8:22:28 AM -     Identifier      : VSProPack.Microsoft.15893CD4-2422-4427-BEA8-4E28DCC26346
2015-07-22 8:22:28 AM -     Name            : Productivity Power Tools 2015
2015-07-22 8:22:28 AM -     Author          : Microsoft
2015-07-22 8:22:28 AM -     Version         : 14.0.23120.0
2015-07-22 8:22:28 AM -     Description     : A set of extensions to Visual Studio 2015 Community (and above) which improves developer productivity.
2015-07-22 8:22:28 AM -     Locale          : en-US
2015-07-22 8:22:28 AM -     MoreInfoURL     : http://go.microsoft.com/fwlink/p/?LinkID=618589
2015-07-22 8:22:28 AM -     InstalledByMSI  : False
2015-07-22 8:22:28 AM -     SupportedFrameworkVersionRange : [4.5,)
2015-07-22 8:22:28 AM - 
2015-07-22 8:22:28 AM - System.Security.Cryptography.CryptographicException: SignatureDescription could not be created for the signature algorithm supplied.
   at System.Security.Cryptography.Xml.SignedXml.CheckSignedInfo(AsymmetricAlgorithm key)
   at System.Security.Cryptography.Xml.SignedXml.CheckSignature(AsymmetricAlgorithm key)
   at System.Security.Cryptography.Xml.SignedXml.CheckSignature(X509Certificate2 certificate, Boolean verifySignatureOnly)
   at MS.Internal.IO.Packaging.XmlDigitalSignatureProcessor.Verify(X509Certificate2 signer)
   at System.IO.Packaging.PackageDigitalSignature.Verify(X509Certificate signingCertificate)
   at System.IO.Packaging.PackageDigitalSignature.Verify()
   at Microsoft.VisualStudio.ExtensionManager.InstallableExtensionImpl.GetSignatureState(ZipPackage vsixPackage)
   at Microsoft.VisualStudio.ExtensionManager.InstallableExtensionImpl.get_SignatureState()
   at VSIXInstaller.App.LogExtensionDetails(IExtension extension)
   at VSIXInstaller.App.InitializeInstall(Boolean isRepairSupported)
   at VSIXInstaller.App.InitializeInstall()
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()

Answer 1

Found the answer after scanning through the description section again:

Productivity Power Tools 2015 can not be installed on the RC version of VS 2015.

NOTE:

This version is signed in a manner which is not supported by the RC version of Visual Studio 2015. It will only install on the RTM version. You can download the RTM version of Visual Studio 2015 here - the Visual Studio 2015 Community Edition and higher support the installation of Productivity Power Tools and other Visual Studio Extensions.