We are trying to sync LDAP in JIRA and getting the below network error- can someone please assist?

We are trying to sync LDAP in JIRA and getting the below network error- can someone please assist?
2021-04-14 15:03:30,174+0200 Caesium-1-4 INFO ServiceRunner [c.a.crowd.directory.DbCachingRemoteDirectory] failed synchronisation complete for directory [ 10500 ] in [ 105152ms ]
2021-04-14 15:03:30,191+0200 Caesium-1-4 ERROR ServiceRunner [c.a.crowd.directory.DbCachingDirectoryPoller] Error occurred while refreshing the cache for directory [ 10500 ].
java.lang.NullPointerException
at javax.naming.ldap.Rfc2253Parser.(Rfc2253Parser.java:48)
at javax.naming.ldap.LdapName.parse(LdapName.java:785)
at javax.naming.ldap.LdapName.(LdapName.java:123)
at com.atlassian.crowd.directory.MicrosoftActiveDirectory.fetchInvocationId(MicrosoftActiveDirectory.java:716)
at com.atlassian.crowd.directory.synchronisation.cache.UsnChangedCacheRefresher.synchroniseAll(UsnChangedCacheRefresher.java:176)
at com.atlassian.crowd.directory.DbCachingRemoteDirectory.synchroniseCache(DbCachingRemoteDirectory.java:1049)
at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.lambda$synchronise$0(DirectorySynchroniserImpl.java:80)
at com.atlassian.crowd.audit.NoOpAuditLogContext.withAuditLogSource(NoOpAuditLogContext.java:17)
at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:78)
at com.atlassian.crowd.directory.DbCachingDirectoryPoller.pollChanges(DbCachingDirectoryPoller.java:45)
at com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerJobRunner.runJob(DirectoryPollerJobRunner.java:92)
at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:134)
at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:106)
at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:90)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:435)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:430)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:454)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:382)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:66)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:60)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:35)
at java.lang.Thread.run(Thread.java:748)