SEVERE: Error while serving http://localhost:8080/descriptor/hudson.model.DownloadService/byId/hudson.tasks.Maven.MavenInstaller/postBack
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:297)
        at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:160)
        at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:95)
        at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:111)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
        at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:239)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
        at org.kohsuke.stapler.MetaClass$12.dispatch(MetaClass.java:381)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
        at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:201)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:587)
        at org.kohsuke.stapler.Stapler.service(Stapler.java:218)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:45)
        at winstone.ServletConfiguration.execute(ServletConfiguration.java:248)
        at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:376)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:96)
        at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:88)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
        at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
        at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
        at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
        at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
        at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
        at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
        at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
        at winstone.RequestDispatcher.forward(RequestDispatcher.java:331)
        at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:227)
        at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: net.sf.json.JSONException: JSONObject["certificates"] is not a JSONArray.
        at net.sf.json.JSONObject.getJSONArray(JSONObject.java:1986)
        at jenkins.util.JSONSignatureValidator.verifySignature(JSONSignatureValidator.java:60)
        at hudson.model.DownloadService$Downloadable.doPostBack(DownloadService.java:259)
        ... 55 more