If you install the Google Play Game Plugin, you will not be able to sign in to Facebook. (iOS)

I loaded the Facebook sample project into a blank project.
I ran it, and I succeeded in signing in on Facebook.

I added the Google Play Games plugin to my Facebook sample.
And I installed it with CocoaPods.

I rebuilt, but I could not log in to Facebook.
The value of ILoginResult.Canceled is always true.

I just installed the Google Play game plugin. I did not modify the source code.

Is Facebook and Google Play games clashing? Google login works well.

Unity: 5.3.7p3
Facebook Plugin: 7.9.4
Google Play Game: 0.9.36

Please tell me how to fix it. Thank you.

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