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java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.containsKey(ConcurrentHashMap.java:911) at com.facebook.internal.Utility.queryAppSettings(Utility.java:802) at com.facebook.login.widget.LoginButton$1.run(LoginButton.java:509) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:841)