Do anybody have any idea why is this issue happened?

This is adding to the log repeatedly. 

2022-04-11 10:54:57,240 [ES PassivationDaemon] [          ] [                    ] [                    ] (ternal.async.PassivationDaemon) ERROR   - Failed to process passivation queue:  java.lang.NoClassDefFoundError: com/pega/pegarules/session/internal/mgmt/QuiesceManager at com.pega.pegarules.session.internal.mgmt.PRNodeImpl.initalizeAndGetQuiesceManager(PRNodeImpl.java:2654) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.mgmt.PRNodeImpl.getQuiesceManager(PRNodeImpl.java:2649) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.mgmt.base.NodeRequestorMgt.processPassivationQueue(NodeRequestorMgt.java:2719) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.async.PassivationDaemon.processPassivationQueue(PassivationDaemon.java:367) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.async.PassivationDaemon.run(PassivationDaemon.java:341) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1382) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1125) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:932) ~[prprivate-session.jar:?] at com.pega.pegarules.session.internal.async.PassivationDaemon.run(PassivationDaemon.java:295) ~[prprivate-session.jar:?] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_292]