google api java script files not found when building Vaadin 8 full-stack S

Simple Vaadin 8 spring starter pack will compile and run on Tomcat, but not on SpringBoot.
https://vaadin.com/start/framework/full-stack-spring

The error log prints:

2019-02-12 17:44:18.167 INFO 13708 — [nio-8080-exec-1]
com.vaadin.server.VaadinServlet : Requested resource
[/VAADIN/static/server/workbox/workbox-core.dev.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.

2019-02-12 17:44:18.167 INFO 13708 — [nio-8080-exec-3]
com.vaadin.server.VaadinServlet : Requested resource
[/VAADIN/static/server/workbox/workbox-sw.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.

2019-02-12 17:44:18.169 INFO 13708 — [nio-8080-exec-5]
com.vaadin.server.VaadinServlet : Requested resource
[/VAADIN/static/server/workbox/workbox-precaching.dev.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.

Where are those comming from? I found they are some googleapi scripts. It could be the:

				<!-- Plugin for automatically download Chrome Driver for tests -->
				<plugin>
					<groupId>com.lazerycode.selenium</groupId>
					<artifactId>driver-binary-downloader-maven-plugin</artifactId>
					<version>1.0.12</version>

from starter pack pom.xml…
Can this be fixed?