Bug: crashes while installing an app

Full backtrace below:

time: 1565539223789
msg: java.lang.IllegalStateException: Fragment SearchFragment{8ac3c6c (7d5ec22d-1bd3-4231-96a1-f20ff8080a52)} has not been attached yet.
stacktrace: java.lang.IllegalStateException: Fragment SearchFragment{8ac3c6c (7d5ec22d-1bd3-4231-96a1-f20ff8080a52)} has not been attached yet.
	at androidx.fragment.app.Fragment.getChildFragmentManager(Fragment.java:914)
	at com.aurora.store.activity.AuroraActivity.onBackPressed(AuroraActivity.java:129)
	at android.app.Activity.onKeyUp(Activity.java:3084)
	at android.view.KeyEvent.dispatch(KeyEvent.java:2716)
	at android.app.Activity.dispatchKeyEvent(Activity.java:3367)
	at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.java:80)
	at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:84)
	at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.java:98)
	at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:558)
	at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
	at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:2804)
	at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
	at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:342)
	at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:5106)
	at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4974)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4481)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4534)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4500)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4640)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4508)
	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4697)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4481)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4534)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4500)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4508)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4481)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4534)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4500)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4640)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4508)
	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4697)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4481)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4534)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4500)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4508)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4481)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4534)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4500)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4640)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4508)
	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4697)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4481)
	at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7319)
	at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7288)
	at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7249)
	at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7422)
	at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:187)
	at android.os.MessageQueue.nativePollOnce(Native Method)
	at android.os.MessageQueue.next(MessageQueue.java:326)
	at android.os.Looper.loop(Looper.java:160)
	at android.app.ActivityThread.main(ActivityThread.java:6739)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:495)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:859)