Using Jenkins version 2.89

Running on Java

/u01/app/jdk1.8.0_201/bin/java -version
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)

I have tried to change java.security

jdk.certpath.disabledAlgorithms=MD2, DSA, RSA keySize < 2048 to

jdk.certpath.disabledAlgorithms=MD2, DSA, RSA keySize < 1024

But still getting issue. Pls check

Error on console:

Aug 22, 2022 4:25:14 AM hudson.model.UpdateSite updateData
SEVERE: ERROR: Signature verification failed in update site 'default' <a href='#' class='showDetails'>(show details)</a><pre style='display:none'>java.security.SignatureException: Signature length not correct: got 512 but was expecting 256<br>        at sun.security.rsa.RSASignature.engineVerify(RSASignature.java:189)<br>     at java.security.Signature$Delegate.engineVerify(Signature.java:1222)<br>       at java.security.Signature.verify(Signature.java:655)<br>    at sun.security.x509.X509CertImpl.verify(X509CertImpl.java:444)<br>     at sun.security.provider.certpath.BasicChecker.verifySignature(BasicChecker.java:166)<br>    at sun.security.provider.certpath.BasicChecker.check(BasicChecker.java:147)<br> at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:125)<br>Caused: java.security.cert.CertPathValidatorException: signature check failed<br>    at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:135)<br>     at sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:233)<br> at sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:141)<br>    at sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(PKIXCertPathValidator.java:80)<br>    at java.security.cert.CertPathValidator.validate(CertPathValidator.java:292)<br>     at org.jvnet.hudson.crypto.CertificateUtil.validatePath(CertificateUtil.java:93)<br>    at jenkins.util.JSONSignatureValidator.verifySignature(JSONSignatureValidator.java:78)<br>   at hudson.model.UpdateSite.verifySignature(UpdateSite.java:254)<br>     at hudson.model.UpdateSite.updateData(UpdateSite.java:219)<br>       at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:190)<br>   at hudson.PluginManager.doCheckUpdatesServer(PluginManager.java:1634)<br>    at jenkins.model.DownloadSettings$DailyCheck.execute(DownloadSettings.java:131)<br>     at hudson.model.AsyncPeriodicWork$1.run(AsyncPeriodicWork.java:101)<br>      at java.lang.Thread.run(Thread.java:748)<br></pre>