IIS 7.5 – Unable to deploy second server to WFF farm, "Failed to upload assembly ‘Microsoft.Web.PlatformInstaller, Version=3.0.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ on remote agent"

I recently had a case where customer was setting up a web farm using the Web Farm Framework (WFF).   Customer could setup the controller and deploy the primary server. However, when attempting to deploy a secondary server into the farm, it failed with the following:   Failed to upload assembly ‘Microsoft.Web.PlatformInstaller, Version=3.0.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’…

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