java.lang.IllegalStateException on Android 4 devices

[Yonjuni]

Exclusively on Android 4

java.lang.IllegalStateException: at android.app.Fragment.getResources(Fragment.java:766) at android.app.Fragment.getString(Fragment.java:788) at org.secuso.privacyfriendlypasswordgenerator.dialogs.BenchmarkDialog$2.onPostExecute(BenchmarkDialog.java:130) at org.secuso.privacyfriendlypasswordgenerator.dialogs.BenchmarkDialog$2.onPostExecute(BenchmarkDialog.java:108) at android.os.AsyncTask.finish(AsyncTask.java:631) at android.os.AsyncTask.access$600(AsyncTask.java:177) at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5419) at java.lang.reflect.Method.invokeNative(Native Method:0) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) at dalvik.system.NativeStart.main(Native Method:0)