Vaadin 14 app not loading cache.js files causing blank page - vaadin

Question

When I try to load my application in Vaadin 14 I see a blank screen like this...
It appears that the servlet container is in fact running but it cannot host some static resources...
When I look in the network tab in the Chrome inspector I see it cannot find a few files such as
http://localhost:8080/VAADIN/static/client/client-122CE29AC0B9685B4DC485343E774096.cache.js
I am unsure why this would be. Any ideas?
UPDATE:
It appears I have to manually ensure all of my .jar files get added as resources in jetty so the static content can be served. I tried doing this like so and it works fine on my laptop but not on the server...
public class App {
public static void main(String[] args) throws Exception {
final var server = new Server(8080);
// Specifies the order in which the configurations are scanned.
Configuration.ClassList classlist = Configuration.ClassList.setServerDefault(server);
classlist.addAfter("org.eclipse.jetty.webapp.FragmentConfiguration", "org.eclipse.jetty.plus.webapp.EnvConfiguration", "org.eclipse.jetty.plus.webapp.PlusConfiguration");
classlist.addBefore("org.eclipse.jetty.webapp.JettyWebXmlConfiguration", "org.eclipse.jetty.annotations.AnnotationConfiguration");
// Creation of a temporal directory.
File tempDir = new File(System.getProperty("java.io.tmpdir"), "JettyTest");
if (tempDir.exists()) {
if (!tempDir.isDirectory()) {
throw new RuntimeException("Not a directory: " + tempDir);
}
} else if (!tempDir.mkdirs()) {
throw new RuntimeException("Could not make: " + tempDir);
}
WebAppContext context = new WebAppContext();
context.setInitParameter("productionMode", "false");
// Context path of the application.
context.setContextPath("");
// Exploded war or not.
context.setExtractWAR(false);
context.setTempDirectory(tempDir);
// It pulls the respective config from the VaadinServlet.
context.addServlet(GuiceVaadinServlet.class, "/*").setInitOrder(1);
context.setAttribute("org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern", ".*");
context.setParentLoaderPriority(true);
server.setHandler(context);
// This add jars to the jetty classpath in a certain syntax and the pattern makes sure to load all of them.
final var classpathEntries = ClassPathHelper.getAllClassPathEntries();
final var ideMode = classpathEntries.size() > 1;
final var resourceList = new ArrayList<Resource>();
final var jarFiles = new ArrayList<File>();
if (ideMode) {
System.out.println("Starting in IDE Mode");
for (String entry : ClassPathHelper.getAllClassPathEntries()) {
if (entry.endsWith(".jar")) {
final var file = new File(entry);
jarFiles.add(file);
}
}
} else {
final var baseInstallDir = System.getProperty("user.dir");
System.out.println("Starting in Server WebJar Mode");
final var libsDirectory = new File(baseInstallDir, "lib");
System.out.println("Scanning for jars in " + libsDirectory.getPath());
for (File file : Objects.requireNonNull(libsDirectory.listFiles())) {
if (file.getPath().endsWith(".jar")) {
jarFiles.add(file);
}
}
final var sferionJar = new File(baseInstallDir, "sferion.jar");
jarFiles.add(sferionJar);
System.out.println("Found " + jarFiles.size() + " jar files");
}
for (File jarFile : jarFiles) {
resourceList.add(Resource.newResource("jar:" + jarFile.toURI().toURL() + "!/"));
}
if (ideMode) {
// It adds the web application resources. Styles, client-side components, ...
//TODO: make this property dynamic somehow?
resourceList.add(Resource.newResource("/usr/local/code/sferion/planglobal/src/main/webapp"));
}
// The base resource is where jetty serves its static content from.
context.setBaseResource(new ResourceCollection(resourceList.toArray(new Resource[0])));
server.start();
server.join();
}
}