Fody: Could not find a weaver named 'PropertyChanged'.
If you have nuget package restore turned on you probably need to do a build to download the weavers.
Alternatively you may have added a weaver to your 'FodyWeavers.xml' and forgot to add the appropriate nuget package.
Perhaps you need to run 'Install-Package PropertyChanged.Fody'. This url may provide more information http://nuget.org/packages/PropertyChanged.Fody/
<add key="repositorypath" value="..\..\your_package_dir\packages" />