Credential cache read error

Hello,

I have a build, and when I run it on one build agent (VM, RHEL 6.10, kerberos 1.10.3, Java 1.8.0_221), all is fine.

But on another build agent (AWS, RHEL 7.7, kerberos 1.15.1, Java 1.8.0_231) I get this error:

jcsi.kerberos: Warning: Error opening credential cache at location '/tmp/krb5cc_1234567': java.io.IOException: Bad tag encountered: 50
jcsi.kerberos: Created in-memory credential cache
jcsi.kerberos: getting TGT from cache for principal user@realm
jcsi.kerberos: login failed: Could not obtain password
jcsi.kerberos: resetting state...

com.quest.vsj:vsj-standard:jar:3.3-3603-TP2-3598-3609 is used.

I've found "Warning: Error opening credential cache..." in com.dstc.security.kerberos.creds.UnixCacheFactory and got stuck after this.

Could you explain me, what is "Bad tag encountered: 50" (credential cache at location '/tmp/krb5cc_1234567' exists, and can be checked with klist command). Is it the root cause of "login failed: Could not obtain password".

May it be kerberos misconfiguration?

Sorry if posted to wrong thread.