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java.lang.NullPointerException: 	at jenkins.plugins.nodejs.tools.NodeJSInstallation$1.call(NodeJSInstallation.java:92)	at jenkins.plugins.nodejs.tools.NodeJSInstallation$1.call(NodeJSInstallation.java:87)	at hudson.remoting.UserRequest.perform(UserRequest.java:121)	at hudson.remoting.UserRequest.perform(UserRequest.java:49)	at hudson.remoting.Request$2.run(Request.java:324)	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at hudson.remoting.Engine$1$1.run(Engine.java:63)	at java.lang.Thread.run(Thread.java:745)