Vaadin Moving from 23 to 24 fails to find ironListConnector.js

Question

App runs fine in 23, working to update to 24.0.2.

App builds without errors but get the following errors on execution from the NetBeans IDE.

There is a long series of lines after the initial error report that I'm leaving out but can provide.

java.lang.RuntimeException: Unable to initialize com.vaadin.flow.spring.VaadinServletContextInitializer$DevModeServletContextListener
    at com.vaadin.flow.spring.VaadinServletContextInitializer$FailFastServletContextListener.contextInitialized(VaadinServletContextInitializer.java:191) ~[vaadin-spring-24.0.3.jar:na]
...
Caused by: java.util.concurrent.CompletionException: java.lang.IllegalStateException: 

  Failed to find the following files: 
      - ./ironListConnector.js
      - ./ironListStyles.js
  
  Locations searched were:
      - `/home/white/OneDrive/Documents/Dev/hpitpc/./frontend` in this project
      - `META-INF/frontend` in included JARs
      - `META-INF/resources/frontend` in included JARs

Searching everywhere it seems that the ironList* files are a part of @polymer yet I am not using any @polymer stuff that I know of. And yet, the package.json includes references to @polymer:

{
  "name": "no-name",
  "license": "UNLICENSED",
  "dependencies": {
    "@polymer/iron-ajax": "3.0.1",
    "@polymer/iron-icon": "3.0.1",
    "@polymer/iron-list": "3.1.0",
    "@polymer/polymer": "3.5.1",
    "@vaadin/accordion": "24.0.2",
...
}

I think these are somehow related but am at a loss on where to look for resolution.

Any help would be most welcome!