Assets/UnityPackages/CodeAnalysisVsHook/Editor/CodeAnalysisVsHook.cs(8,7): error CS0246: The type or namespace name `SyntaxTree' could not be found. Are you missing a using directive or an assembly reference?
Got the error on the client side with Unity 5.3.6f1. Though removing CodeAnalysisVsHook.cs file runs ok without any problem.