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java.lang.NullPointerException: 	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:883)	at co.getcontrol.services.MerchantCenter.accountForKey(MerchantCenter.java:72)	at co.getcontrol.model.customers.CustomersAggregator.loadCustomerDetails(CustomersAggregator.java:91)	at co.getcontrol.model.customers.CustomerDetailsPresenter.callData(CustomerDetailsPresenter.java:39)	at co.getcontrol.reskin.ui.customers.CustomerDetailsViewFragment.onCreateView(CustomerDetailsViewFragment.java:152)	at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)	at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)	at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)	at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:339)	at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:602)	at co.getcontrol.ui.ControlActivity.onStart(ControlActivity.java:13)	at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1174)	at android.app.Activity.performStart(Activity.java:5353)	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2352)	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2441)	at android.app.ActivityThread.access$900(ActivityThread.java:151)	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)	at android.os.Handler.dispatchMessage(Handler.java:110)	at android.os.Looper.loop(Looper.java:193)	at android.app.ActivityThread.main(ActivityThread.java:5345)	at java.lang.reflect.Method.invokeNative(Method.java)	at java.lang.reflect.Method.invoke(Method.java:515)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:828)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644)	at dalvik.system.NativeStart.main(NativeStart.java)