Android : Android studio: ResourceBundle [messages] not found for MessageSource: Can't find bundle for base name messages, locale en_US

I am trying to run the project: https://github.com/spring-projects/spring-android-samples/tree/master/spring-android-basic-auth on android studio. I have imported the server and client projects separately and am running the server on the terminal using:

gradlew build bootRun

I am running the client directly from android studio on an avd and when I apply the correct username password, I get 404 not found with the error:

ResourceBundle [messages] not found for MessageSource: Can't find bundle for base name messages, locale en_US

I am guessing I need to do something similar to this but am not sure how to do it in Android Studio.