When connecting to TestLink, finding error ClassCastException

When connecting to TestLink from jenkins, the following error is coming.

Started by user Admin
Building on master in workspace /home/nabslink/.jenkins/jobs/Jenkins-TaskLink-Plugin-Example/workspace
Preparing TestLink client API.
Using TestLink URL: http://xenapdev001/testlink/lib/api/xmlrpc.php

FATAL: java.util.HashMap cannot be cast to [Ljava.lang.Object;
java.lang.ClassCastException: java.util.HashMap cannot be cast to [Ljava.lang.Object;
at br.eti.kinoshita.testlinkjavaapi.util.Util.castToArray(Util.java:642)
at br.eti.kinoshita.testlinkjavaapi.TestProjectService.getTestProjectByName(TestProjectService.java:111)
at br.eti.kinoshita.testlinkjavaapi.TestLinkAPI.getTestProjectByName(TestLinkAPI.java:485)
at hudson.plugins.testlink.TestLinkBuilder.getTestLinkSite(TestLinkBuilder.java:246)
at hudson.plugins.testlink.TestLinkBuilder.perform(TestLinkBuilder.java:134)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:798)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:160)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:580)
at hudson.model.Run.execute(Run.java:1575)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:237)