Skype calls not working

Apparently some people are successfully using Skype. For me, this is not working unfortunately. Incoming calls pop up a new window briefly, which immediately closes again. I've tried installing it from both Yandex Store and Google Play. This is what is shown in the logs: E/QualcommCamera( 1434): Qint android::get_camera_info(int, camera_info*): E W/AudioFlinger( 1434): session id 5 not found for pid 1434 W/AudioFlinger( 1434): session id 6 not found for pid 1434 D/AlienPowerManagerInterface( 1508): alienPMSetScreenState -> true D/ActivityManager( 1508): Alien Native-Call for:Intent { flg=0x10040004 cmp=com.skype.raider/com.skype.android.app.calling.PreCallActivity (has extras) } I/ActivityManager( 1508): START {flg=0x10040004 cmp=com.skype.raider/com.skype.android.app.calling.PreCallActivity (has extras) u=0} from pid 4520 D/AlienRuntime( 1508): WLAlienRuntime::onMinimize, mVisibleState = 3 D/IAlienSensorService( 1435): ......ACTIVATE start...... D/AlienSensorService( 1435): ......activate...... D/IAlienSensorService( 1435): ......ACTIVATE end...... D/AlienSensorService( 1435): ......activate 0 accelerometer...... D/IAlienSensorService( 1508): ......activate end...... D/ActivityManager( 1508): Alien Native-Call for:Intent { flg=0x10000000 cmp=com.myriadgroup.home/.FakeHome } I/ActivityManager( 1508): START {flg=0x10000000 cmp=com.myriadgroup.home/.FakeHome u=0} from pid 1508 D/FakeHome( 1686): onRestart D/dalvikvm( 4520): GC_CONCURRENT freed 1434K, 25% free 12891K/16963K, paused 13ms+3ms, total 93ms D/AndroidRuntime( 4520): Shutting down VM W/dalvikvm( 4520): threadid=1: thread exiting with uncaught exception (group=0x40b94360) W/System.err( 4520): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.skype.raider/com.skype.android.app.calling.PreCallActivity}: java.lang.NullPointerException W/System.err( 4520): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2066) W/System.err( 4520): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2091) W/System.err( 4520): at android.app.ActivityThread.access$600(ActivityThread.java:137) W/System.err( 4520): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1202) W/System.err( 4520): at android.os.Handler.dispatchMessage(Handler.java:99) W/System.err( 4520): at android.os.Looper.loop(Looper.java:137) W/System.err( 4520): at android.app.ActivityThread.main(ActivityThread.java:4781) W/System.err( 4520): at java.lang.reflect.Method.invokeNative(Native Method) W/System.err( 4520): at java.lang.reflect.Method.invoke(Method.java:511) W/System.err( 4520): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:805) W/System.err( 4520): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:568) W/System.err( 4520): at dalvik.system.NativeStart.main(Native Method) W/System.err( 4520): Caused by: java.lang.NullPointerException W/System.err( 4520): at com.skype.android.audio.AudioRoute.b(AudioRoute.java:100) W/System.err( 4520): at com.skype.android.audio.AudioRoute.a(AudioRoute.java:82) W/System.err( 4520): at com.skype.android.app.calling.PreCallActivity.onNewIntent(PreCallActivity.java:238) W/System.err( 4520): at com.skype.android.app.calling.PreCallActivity.onCreate(PreCallActivity.java:166) W/System.err( 4520): at android.app.Activity.performCreate(Activity.java:5008) W/System.err( 4520): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) W/System.err( 4520): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2030) W/System.err( 4520): ... 11 more W/System.err( 4520): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.skype.raider/com.skype.android.app.calling.PreCallActivity}: java.lang.NullPointerException W/System.err( 4520): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2066) W/System.err( 4520): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2091) W/System.err( 4520): at android.app.ActivityThread.access$600(ActivityThread.java:137) W/System.err( 4520): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1202) W/System.err( 4520): at android.os.Handler.dispatchMessage(Handler.java:99) W/System.err( 4520): at android.os.Looper.loop(Looper.java:137) W/System.err( 4520): at android.app.ActivityThread.main(ActivityThread.java:4781) W/System.err( 4520): at java.lang.reflect.Method.invokeNative(Native Method) W/System.err( 4520): at java.lang.reflect.Method.invoke(Method.java:511) W/System.err( 4520): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:805) W/System.err( 4520): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:568) W/System.err( 4520): at dalvik.system.NativeStart.main(Native Method) W/System.err( 4520): Caused by: java.lang.NullPointerException W/System.err( 4520): at com.skype.android.audio.AudioRoute.b(AudioRoute.java:100) W/System.err( 4520): at com.skype.android.audio.AudioRoute.a(AudioRoute.java:82) W/System.err( 4520): at com.skype.android.app.calling.PreCallActivity.onNewIntent(PreCallActivity.java:238) W/System.err( 4520): at com.skype.android.app.calling.PreCallActivity.onCreate(PreCallActivity.java:166) W/System.err( 4520): at android.app.Activity.performCreate(Activity.java:5008) W/System.err( 4520): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) W/System.err( 4520): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2030) W/System.err( 4520): ... 11 more D/ActivityManager( 1508): Alien Native-Call for:Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x14008000 pkg=com.skype.raider cmp=com.skype.raider/.Main } D/FakeHome( 1686): onPause I/Process ( 4520): Sending signal. PID: 4520 SIG: 9 D/AlienPowerManagerInterface( 1508): alienPMSetScreenState -> false I/WindowState( 1508): WIN DEATH: Window{419b7c38 com.skype.raider/com.skype.android.app.main.HubActivity paused=true} W/ActivityManager( 1508): Force removing ActivityRecord{419e4d60 com.skype.raider/.Main}: app died, no saved state W/InputMethodManagerService( 1508): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@417f72b0 attribute=null W/ActivityManager( 1508): Force removing ActivityRecord{419a2770 com.skype.raider/com.skype.android.app.calling.PreCallActivity}: app died, no saved state D/FakeHome( 1686): onResume I/AlienService( 1508): hideAlienWindow() forced = false D/IAlienSensorService( 1435): ......ACTIVATE start...... D/AlienSensorService( 1435): ......activate...... D/IAlienSensorService( 1435): ......ACTIVATE end...... D/AlienSensorService( 1435): ......activate 0 accelerometer......