``` java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewGroup.transformMatrixToLocal(android.graphics.Matrix)' on a null object reference at android.app.ActivityTransitionCoordinator.setSharedElementState(ActivityTransitionCoordinator.java:485) at android.app.ActivityTransitionCoordinator.setSharedElementState(ActivityTransitionCoordinator.java:583) at android.app.EnterTransitionCoordinator.startSharedElementTransition(EnterTransitionCoordinator.java:405) at android.app.EnterTransitionCoordinator.-wrap4(EnterTransitionCoordinator.java) at android.app.EnterTransitionCoordinator$5$1$1.run(EnterTransitionCoordinator.java:475) at android.app.ActivityTransitionCoordinator.startTransition(ActivityTransitionCoordinator.java:836) at android.app.EnterTransitionCoordinator$5$1.onPreDraw(EnterTransitionCoordinator.java:472) at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:1013) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2510) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1519) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7113) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:927) at android.view.Choreographer.doCallbacks(Choreographer.java:702) at android.view.Choreographer.doFrame(Choreographer.java:638) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:913) 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:6780) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386) ``` * Android version: 7.0 * Phone model: SM-T813 (gts210vewifixx) * Briar version: 0.16.2 (63befcc) * User feedback: "Failed reblogging a contact's blog entry with a Samsung s2-tablet."