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Attempt to invoke interface method 'boolean java.util.List.isEmpty()' on a null object reference
java.lang.NullPointerException: Attempt to invoke interface method 'boolean java.util.List.isEmpty()' on a null object reference	at com.alexdisler.inapppurchases.IabHelper.startSetup(IabHelper.java:276)	at com.alexdisler.inapppurchases.InAppBillingV3.init(InAppBillingV3.java:184)	at com.alexdisler.inapppurchases.InAppBillingV3.execute(InAppBillingV3.java:162)	at org.apache.cordova.CordovaPlugin.execute(CordovaPlugin.java:98)	at org.apache.cordova.PluginManager.exec(PluginManager.java:133)	at org.apache.cordova.CordovaBridge.jsExec(CordovaBridge.java:59)	at org.apache.cordova.engine.SystemExposedJsApi.exec(SystemExposedJsApi.java:41)	at org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)	at org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:53)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:148)	at android.os.HandlerThread.run(HandlerThread.java:61)