Running the project in the Unity Editor, after initializing Facebook:
You cannot show two modal windows at once
UnityEngine.GUI:ModalWindow(Int32, Rect, WindowFunction, String, GUIStyle)
Facebook.Unity.Editor.EditorFacebookMockDialog:OnGUI()
This issue occurs under Windows 10 but not under OSX
Unity 5.6.1f1
Facebook SDK v7.9.4
yeah :( i have same problem
Issue still occurs in Unity 2018.4 / FB SDK 7.15.1
Most helpful comment
yeah :( i have same problem