sdkbox::PluginAdMob::init() crash

Hi!

I tried integreted AdMob Ads and I got crash(segmentation fault) my app in this place.

#ifdef SDKBOX_ENABLED
sdkbox::PluginAdMob::init();
#endif

What I did wrong?

I use cocos2d-x, c++ and Android Studio.

plz more info, for example, adb logcat message.