Failed to add Android Instant App features: failed to resolve the project base module

Question

I am trying to convert an existing application into one instant application and follow the instructions: Google codelabs as well as Creating Android Instant App Tutorial - 1

I got stuck in step 5 of the codelabs / 10 minute markup tutorial in the youtube video, where you have to put your base function dependent on the new / apk module:

When I put the implementation of the project ( ': blah-blah') , I get an error : Failed to resolve: Could not resolve project :blah-blah.

I believe this is because: blah-blah is my root module, so I think the child module may have problems accepting it as a dependency. I think this may be a problem because I also cannot rename: blah-blah for this reason, as recommended in both tutorials. I also tried to explicitly declare: blah-blah in the settings.gradle file, as recommended online, but no luck. Any help would be greatly appreciated!