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java.lang.RuntimeException: Cannot load platform configurator	at javax.websocket.server.ServerEndpointConfig$Configurator.fetchContainerDefaultConfigurator(ServerEndpointConfig.java:123)	at javax.websocket.server.ServerEndpointConfig$Configurator.getContainerDefaultConfigurator(ServerEndpointConfig.java:128)	at javax.websocket.server.ServerEndpointConfig$Configurator.checkOrigin(ServerEndpointConfig.java:192)	at org.eclipse.jetty.websocket.jsr356.server.JsrCreator.createWebSocket(JsrCreator.java:88)	at org.eclipse.jetty.websocket.server.WebSocketServerFactory.acceptWebSocket(WebSocketServerFactory.java:187)	at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:207)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:70)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:276)	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80)	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)	at org.eclipse.jetty.server.Server.handle(Server.java:524)	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319)	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)	at java.lang.Thread.run(Thread.java:745)