My app does not compile

Hello, Kodular forums.

It has been a long time since I have used Kodular, so please, bare with me here.
Recently, Google deemed my app as in violation of its ad serving policies, as it apparently contains “Content obscuring Google-served ads.” I went into to fix this, but noticed when I compiled my app, it now gives me an error:

Kodular is unable to compile this project.
The compiler error output was
________Preparing application icon
________Creating animation xml
________Creating fragment xml
________Creating listview xml in res/layout/…
________Creating listview xml in res/layout-v21/…
________Creating xml in res/drawable/…
________Creating splash png in res/drawable/…
________Creating colors xml
________Creating styles xml
________Creating drawables xml v21
________Checking for firebase
________Creating provider_path xml
________Creating network_security_config xml
________Generating adaptive icon file
________Generating round adaptive icon file
________Generating adaptive icon background file
________Generating manifest file

I also noticed it seems the error may be linked to Admob.

What can I do to fix this? My app has existed for quite a while (5 years), and I honestly forgot how most of this works.