Switching platforms "DirectoryNotFoundException" error occurs in the console. Error is NOT HARMFUL, likely doesn't affect anything.

Reproducible on 5.2, 5.3 versions. On 5.1 not reproducible.

This happens when Unity is installed in non default location
default - c:\program files\Unity...
not default - d:\Unity...

1. What happened
Switching platforms I get such error:

DirectoryNotFoundException: Could not find a part of the path "C:\Users\WinUser\Documents\New Unity Project\Library\UnityAssemblies\version.txt".
System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.IO/FileStream.cs:292)
System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share)
(wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
System.IO.StreamWriter..ctor (System.String path, Boolean append, System.Text.Encoding encoding, Int32 bufferSize) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.IO/StreamWriter.cs:124)
System.IO.StreamWriter..ctor (System.String path, Boolean append)
(wrapper remoting-invoke-with-check) System.IO.StreamWriter:.ctor (string,bool)
System.IO.File.CreateText (System.String path) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.IO/File.cs:159)
SyntaxTree.VisualStudio.Unity.Bridge.ProjectFilesGenerator.CreateVersionFile (System.String[] assemblies)
SyntaxTree.VisualStudio.Unity.Bridge.ProjectFilesGenerator.DeployUnityAssemblies (SyntaxTree.VisualStudio.Unity.Bridge.ProjectSystem.UnitySolution solution)
SyntaxTree.VisualStudio.Unity.Bridge.ProjectFilesGenerator.GenerateProject ()
UnityEditor.EditorUserBuildSettings.Internal_ActiveBuildTargetChanged () (at C:/buildslave/unity/build/artifacts/generated/common/editor/InternalUtilityBindings.gen.cs:536)
UnityEditor.HostView:OnGUI()

2. How we can reproduce it using the example you attached

Must be related to a fact, that error only occurs, when Unity editor is installed at custom directory (not default c:\program files\Unity.....).

I have installed editor in "D:\Unity 5.2.2\Editor" path.

Repro steps:
Error can be reproduced by opening new empty project and switching platforms (PC -> Android / Android -> iOS / iOS -> PC).