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org.codehaus.groovy.runtime.GStringImpl cannot be cast to java.lang.String
java.lang.ClassCastException: org.codehaus.groovy.runtime.GStringImpl cannot be cast to java.lang.String	at org.jenkinsci.plugins.workflow.steps.ArtifactUnarchiverStepExecution.run(ArtifactUnarchiverStepExecution.java:44)	at org.jenkinsci.plugins.workflow.steps.ArtifactUnarchiverStepExecution.run(ArtifactUnarchiverStepExecution.java:20)	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1$1.call(AbstractSynchronousNonBlockingStepExecution.java:49)	at hudson.security.ACL.impersonate(ACL.java:213)	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1.run(AbstractSynchronousNonBlockingStepExecution.java:47)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	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)