Failed to execute goal dev.hilla:hilla-maven-plugin:2.0.0:build-frontend

I have a hilla-react project that does not build.
npm install runs without errors.
mvn hilla:generate and mvn hilla:prepare-frontend both complete without errors.
mvn hilla:build-frontend is failing with:

Caused by: com.vaadin.flow.server.ExecutionFailedException: Error occured during goal execution: Type [unknown] not present
I’m assuming it’s something in my code, but IntelliJ reports no problems, so I’m not sure how to track this one down.
mvn -version:
Maven home: /opt/apache-maven-3.9.0
Java version: 17.0.6, vendor: Azul Systems, Inc., runtime: /Users/erics/.sdkman/candidates/java/17.0.6-zulu/zulu-17.jdk/Contents/Home
Default locale: en_US, platform encoding: UTF-8
OS name: “mac os x”, version: “13.3.1”, arch: “aarch64”, family: “mac”

Any suggestions would be greatly appreciated.

Does mvn (=mvn spring-boot:run) work?

It gives the same errors.