Mapas do Skobbler no Android mostrando a tela preta

Estou usando o Skobbler SDK 2.3.0, visando o Lollipop, testando em um Nexus 5 e Galaxy S4, com base no Android Studio 1.0.2.

Eu tenho uma única MainActivity com uma gaveta de navegação e fragmentos. Inicializo o Skobbler no MainActivity e carrego o fragmento que exibe os mapas. No entanto, só recebo uma tela preta com a marca d'água "Powered by Scout OSM" no canto inferior direito. Os toques simples e duplos são registrados, mas se eu beliscar para ampliar, o aplicativo trava.

Não vejo nenhum erro no logcat antes do aplicativo travar. Alguém pode ajudar?

Estrutura do projeto:

app / libs / SKMaps.jarapp / src / main / assets / SKMaps.zipapp / src / main / jniLibs / armeabi / libngnative.soapp / src / main / jniLibs / armeabi-v7a / libngnative.soapp / src / main / jniLibs / x86 / libngnative.so

build.grade:

dependencies {
...
...
compile files('libs/SKMaps.jar')
}

logcat

01-05 22:58:42.835 26785-26785/com.example.android I/MainActivity﹕ onCreate 01-05 22:58:42.869 26785-26785/com.example.android I/System.out﹕ Item selected in navigation drawer 01-05 22:58:42.895 26785-26785/com.example.android I/MainActivity﹕ Adding login fragment 01-05 22:58:42.895 26785-26785/com.example.android I/MainActivity﹕ Done 01-05 22:58:42.895 26785-26785/com.example.android I/MainActivity﹕ Initialising Skobbler 01-05 22:58:42.899 26785-26785/com.example.android I/MainActivity﹕ Start initializeLibrary() 01-05 22:58:42.899 26785-26785/com.example.android D/SKMaps﹕ SKMapInitSettings---- Map style [/storage/emulated/0/Android/data/com.example.android/files/SKMaps/daystyle/ , daystyle.json ,-1] 01-05 22:58:42.899 26785-26785/com.example.android D/SKMaps﹕ SKVersionManager----setMapUpdateListener - com.example.android.MainActivity@1c8a98bc 01-05 22:58:42.899 26785-26785/com.example.android I/MainActivity﹕ End initializeLibrary() 01-05 22:58:42.899 26785-26785/com.example.android I/MainActivity﹕ Skobbler initialised 01-05 22:58:42.899 26785-26785/com.example.android I/MainActivity﹕ onCreate end ... 01-05 22:58:55.790 26785-26785/com.example.android D/SKMaps﹕ SKMapSurfaceView----SKMapSurfaceView constructor 01-05 22:58:55.790 26785-26785/com.example.android D/SKMaps﹕ SKMapSurfaceView----os model Nexus 5 01-05 22:58:55.797 26785-26785/com.example.android D/SKMaps﹕ MapRenderer----Set map density 3.0 01-05 22:58:55.800 26785-26785/com.example.android D/SKMaps﹕ SKMapSurfaceView---- ON PAUSE 01-05 22:58:55.803 26785-26785/com.example.android D/SKMaps﹕ SKMapSurfaceView----Saved map cache state [ Map Region zoom=17.0 center= [13.385000228881836,52.51665115356445]] [Display mode=MODE_2D] [Follower mode=NONE] [Compass shown=false Position = [0.0 ,0.0] ] [Rotation=true ] [Panning=true][Zooming=true] [Bearing=0.0] [Annotations=0] 01-05 22:58:55.811 26785-26785/com.example.android E/BitmapFactory﹕ Unable to decode stream: java.io.FileNotFoundException: null/res/xhdpi/icon_map_popup_navigate.png: open failed: ENOENT (No such file or directory) 01-05 22:58:55.813 26785-26785/com.example.android E/BitmapFactory﹕ Unable to decode stream: java.io.FileNotFoundException: null/res/xhdpi/icon_map_popup_arrow.png: open failed: ENOENT (No such file or directory) 01-05 22:58:55.822 26785-26785/com.example.android D/SKMaps﹕ SKMapSurfaceView---- centerMapOnPosition [19.8171,41.3294]

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