AdBanner doesnt display

I followed this tutorial - YouTube where it allows you to display interstitial ads.

The issue is that when I try to display the ads, I get :

“LogModuleManager:Warning: No filename provided for module AndroidAdvertising
LogModuleManager:Warning: ModuleManager: Unable to load module ‘AndroidAdvertising’ because the file ‘C:/Program Files (x86)/Epic Games/4.12/Engine/Binaries/Win64/’ was not found.”

Could anyone point me to where I might be able to fix this problem? Thanks in advance.