Java error message in jenkins pipeline

Hi community,
I’m using jenkins to launch jenkins pipeline to execute an instance of neoload (performance test) on an openshift pod, but i have this error:
java.lang.ClassNotFoundException: java.lang.reflect.InaccessibleObjectException
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:538)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:720)
at hudson.remoting.MultiClassLoaderSerializer$Input.resolveClass(MultiClassLoaderSerializer.java:136)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1925)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1808)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2099)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1625)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:465)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:423)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:289)
at hudson.remoting.UserResponse.retrieve(UserRequest.java:386)
at hudson.remoting.Channel.call(Channel.java:1001)

have you an explanation of this error please ?