Emu You can use the events "On Create full screen Ad successful" and "On Create full screen Ad failed" to make sure you actually managed to create the ad.
When you know the ad is created successfully you do action "Show full screen Ad" and once again check with events "On show full screen Ad successful" and "On show full screen Ad failed" to make sure it was shown successfully.
Wait for the user to dismiss the ad in event "On dismiss full screen Ad" then goto the next layout.
If nothing works there is also a possibility that the Cordova plugin failed to load. You can add a check for that with event "Is ready" before doing a "Create.."