Não é possível iniciar a atividade causada pelo NullPointerException em ContextImpl.openFileOutput

Eu lancei um aplicativo que usa a Biblioteca de Compatibilidade do Android para o Google Maps (https://github.com/petedoyle/android-support-v4-googlemaps) e recebi alguns relatórios de falhas "Impossível iniciar atividade".

Eu colei alguns rastreamentos de pilha de amostra abaixo. Qualquer outra pessoa experimentou isso usando a Biblioteca de Compatibilidade do Android para o Google Maps ou até mesmo usando a Biblioteca de Compatibilidade padrão do Android (http://developer.android.com/sdk/compatibility-library.html) Alguém sabe como eu posso superar esse erro?

----- Exemplo de rastreamento de pilha 1 -----

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mycompany.myapp/com.mycompany.myapp.activities.GameActivity}: java.lang.NullPointerException
...
caused by java.lang.NullPointerException
 at android.app.ContextImpl.openFileOutput(ContextImpl.java:430)
 at android.content.ContextWrapper.openFileOutput(ContextWrapper.java:158)
 at com.google.common.io.android.AndroidPersistentStore.writeBlockX(Unknown Source)
 at com.google.common.io.android.AndroidPersistentStore.writeBlock(Unknown Source)
 at com.google.common.io.PreferenceStore.ensurePreferencesLoaded(Unknown Source)
 at com.google.common.io.PreferenceStore.readPreference(Unknown Source)
 at com.google.common.io.BasePersistentStore.readPreference(Unknown Source)
 at com.google.common.StaticUtil.readPreferenceAsDataInput(Unknown Source)
 at com.google.googlenav.datarequest.DataRequestDispatcher.loadOrRequestCookie(Unknown Source)
 at com.google.googlenav.datarequest.DataRequestDispatcher.<init>(Unknown Source)
 at com.google.googlenav.datarequest.DataRequestDispatcher.createInstance(Unknown Source)
 at com.google.android.maps.MapActivity.createMap(MapActivity.java:509)
 at com.google.android.maps.MapActivity.onCreate(MapActivity.java:409)
 at android.support.v4.app.FragmentActivity.onCreate(Unknown Source)
 at com.mycompany.myapp.activities.GameActivity.onCreate(Unknown Source)
 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)

----- Exemplo de rastreamento de pilha 2 -----

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mycompany.myapp/com.mycompany.myapp.activities.GameActivity}: java.lang.NullPointerException
...
Caused by: java.lang.NullPointerException
 at android.app.ContextImpl.openFileOutput(ContextImpl.java:423)
 at android.content.ContextWrapper.openFileOutput(ContextWrapper.java:158)
 at android_maps_conflict_avoidance.com.google.common.io.android.AndroidPersistentStore.writeBlockX(AndroidPersistentStore.java:140)
 at android_maps_conflict_avoidance.com.google.common.io.android.AndroidPersistentStore.writeBlock(AndroidPersistentStore.java:169)
 at android_maps_conflict_avoidance.com.google.common.io.PreferenceStore.ensurePreferencesLoaded(PreferenceStore.java:178)
 at android_maps_conflict_avoidance.com.google.common.io.PreferenceStore.readPreference(PreferenceStore.java:86)
 at android_maps_conflict_avoidance.com.google.common.io.BasePersistentStore.readPreference(BasePersistentStore.java:41)
 at android_maps_conflict_avoidance.com.google.common.StaticUtil.readPreferenceAsDataInput(StaticUtil.java:271)
 at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher.loadOrRequestCookie(DataRequestDispatcher.java:493)
 at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher.<init>(DataRequestDispatcher.java:390)
 at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher.createInstance(DataRequestDispatcher.java:341)
 at com.google.android.maps.MapActivity.createMap(MapActivity.java:548)
 at com.google.android.maps.MapActivity.onCreate(MapActivity.java:422)
 at android.support.v4.app.FragmentActivity.onCreate(Unknown Source)
 at com.mycompany.myapp.activities.GameActivity.onCreate(Unknown Source)
 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1709)

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