java.lang.NullPointerException: Attempt to write to field 'com.android.server.am.ActivityRecord com.android.server.am.ActivityStack.mLastPausedActivity' on a null object reference
                                             at android.os.Parcel.readException(Parcel.java:1689)
                                             at android.os.Parcel.readException(Parcel.java:1636)
                                             at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:3071)
                                             at android.app.Instrumentation.execStartActivity(Instrumentation.java:1518)
                                             at android.app.Activity.startActivityForResult(Activity.java:4224)
                                             at android.app.Activity.startActivity(Activity.java:4503)
                                             at com.android.launcher3.Launcher.startActivity(Launcher.java:2993)
                                             at com.android.launcher3.Launcher.startActivitySafely(Launcher.java:3036)
                                             at com.android.launcher3.Launcher.startAppShortcutOrInfoActivity(Launcher.java:2723)
                                             at com.android.launcher3.Launcher.onClick(Launcher.java:2559)
                                             at android.view.View.performClick(View.java:5610)
                                             at android.view.View$PerformClick.run(View.java:22265)
                                             at android.os.Handler.handleCallback(Handler.java:751)
                                             at android.os.Handler.dispatchMessage(Handler.java:95)
                                             at android.os.Looper.loop(Looper.java:154)
                                             at android.app.ActivityThread.main(ActivityThread.java:6077)
                                             at java.lang.reflect.Method.invoke(Native Method)
                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
    07-22 13:38:30.549 W/ActivityManager:   Force finishing activity com.android.launcher3/.Launcher