Hello Dellaclearing,
For an app built with Construct 2, Enhance requires an extra step of adding our Cordova plugin to your PhoneGap project. With Cocoon.io it was handled simply by pasting a link into the configuration on their website, but in case of PhoneGap it may require a little more work. You can check the steps in our documentation:
enhance.co/documentation/construct/setup
Setting it up with PhoneGap should be pretty similar to the instructions under the Cordova CLI section.
Additionally, before you upload your app to our service you can run the app on your phone or simulator and verify if you see dummy ads when calling connector methods like "show interstitial ad" - this way you can check if everything clicked together.
Let us know if you have any issues!