RH-SSO realm export fails with "org.keycloak.models.ModelException: LDAP Query failed"

Issue

• Attempting to export realm form the command line following the RH-SSO documentation fails with the following errors:

INFO  [org.keycloak.services] (ServerService Thread Pool -- 68) KC-SERVICES0033: Full model export requested
INFO  [org.keycloak.exportimport.singlefile.SingleFileExportProvider] (ServerService Thread Pool -- 68) Exporting model into file /RH-SSO_HOME/bin/keycloak-export.json
INFO  [org.keycloak.storage.ldap.LDAPIdentityStoreRegistry] (ServerService Thread Pool -- 68) Creating new LDAP Store for the LDAP storage provider: 'ldap', LDAP Configuration: {fullSyncPeriod=[-1], pagination=[true], usersDn=[dc=keycloak,dc=org], connectionPooling=[true], cachePolicy=[DEFAULT], useKerberosForPasswordAuthentication=[false], importEnabled=[true], enabled=[true], changedSyncPeriod=[-1], usernameLDAPAttribute=[uid], bindDn=[uid=testLdap,ou=People,dc=keycloak,dc=org], lastSync=[1612557744], vendor=[rhds], uuidLDAPAttribute=[uid], allowKerberosAuthentication=[false], connectionUrl=[ldap://127.0.0.1:10389], syncRegistrations=[false], authType=[simple], debug=[false], searchScope=[2], useTruststoreSpi=[ldapsOnly], priority=[0], trustEmail=[false], userObjectClasses=[inetOrgPerson, organizationalPerson], rdnLDAPAttribute=[uid], validatePasswordPolicy=[false], batchSizeForSync=[1000]}, binaryAttributes: []
FATAL [org.keycloak.services] (ServerService Thread Pool -- 68) org.keycloak.models.ModelException: LDAP Query failed