Without a little information on how you setup your project, we won't be able to help you. What settings are you using? I see you can't post a link, but can you at least tell us the name of the tutorial series you used? Unfortunately, without some idea of what you have done, those of us who would like to help you out, don't even know where to start.
Sorry, but i can't post url. I can tell title of tutorial: How to setup AdMob ads on Construct 2 + MoPub + CocoonJS.
What settings interesting for you?