Windows x86 support for Unity Editor

Hi, I am doing all samples in this guide but get same exception in all projects, following step by step.
I have Unity 5.6.1f1, Firebase Unity SDK 4.0.1

InitializationException: A Firebase shared library (.dll / .so) could not be loaded.
Firebase is distributed with native (C/C++) dependencies
that are required by the SDK.

It's possible that parts of Firebase SDK have been removed from
your Unity project.

To resolve the problem, try re-importing your Firebase plugins and
building again.

Alternatively, you may be trying to use Firebase on an unsupported
platform. See the Firebase website for the list of supported
platforms.

Firebase.FirebaseApp.TranslateDllNotFoundException (System.Action closureToExecute)
Firebase.FirebaseApp+FirebaseHandler.Create ()
Firebase.FirebaseApp.get_DefaultInstance ()
Firebase.Analytics.FirebaseAnalytics..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Firebase.Analytics.FirebaseAnalytics
UIHandler.InitializeFirebase () (at Assets/TestApp/UIHandler.cs:66)
UIHandler.Start () (at Assets/TestApp/UIHandler.cs:52)