java.lang.NullPointerException: This exception has no message.

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This exception has no message.
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This exception has no message.
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This exception has no message.
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This exception has no message.
java.lang.NullPointerException:
at com.vaadin.framework8.migrate.MavenResolver.resolve(MavenResolver.java:68)
at com.vaadin.framework8.migrate.VadinJarFinder.download(VadinJarFinder.java:55)
at com.vaadin.framework8.migrate.VadinJarFinder.lambda$get$0(VadinJarFinder.java:22)
at java.util.Optional.orElseGet(Unknown Source)
at com.vaadin.framework8.migrate.VadinJarFinder.get(VadinJarFinder.java:22)
at com.vaadin.framework8.migrate.Migrate.main(Migrate.java:38)

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