javax.websocket.DeploymentException: This exception has no message.

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java.lang.NullPointerException:
at org.glassfish.tyrus.core.AnnotatedEndpoint.(AnnotatedEndpoint.java:161)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:516)
at pre.Web.(Web.java:19)
at pre.TestApp.main(TestApp.java:10)

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