How do I fix Chartboost ad?

I use cranberrygame Cordova Chartboost 1.0.3 plugin for interstitials and it crashes my game. When action for preloading ad fires off it freezes the game for couple seconds than crashes. No ad is shown. I tried test and live mode and it's still the same. When the wifi is turned off, the game keeps going so there's problem with requesting the interstitial. Has anyone had the same problem?