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Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:746)	at java.util.concurrent.ConcurrentHashMap.containsKey(ConcurrentHashMap.java:774)	at com.facebook.internal.Utility.queryAppSettings(Utility.java:825)	at com.facebook.login.widget.LoginButton$1.run(LoginButton.java:489)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)	at java.lang.Thread.run(Thread.java:818)