java.lang.IllegalStateException: No protocol factory for default protocol: null

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No protocol factory for default protocol: null
java.lang.IllegalStateException: No protocol factory for default protocol: null
at org.eclipse.jetty.server.AbstractConnector.doStart(AbstractConnector.java:258)
at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:81)
at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:235)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.server.Server.doStart(Server.java:390)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1516)
at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1441)

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