First, i've installed and configured OpenLDAP with slapd.conf file
schemas in slapd.conf
include ./schema/core.schema
include ./schema/dicom.schema
include ./schema/dcm4che.schema
include ./schema/dcm4chee-archive.schema
include ./schema/dcm4chee-archive-ui.schema
suffix "dc=dcm4che,dc=org"
rootdn "cn=admin,dc=dcm4che,dc=org"
..
Next following the steps i've imported successfully the first three ldif without any issues
$DCM4CHEE_ARC/ldap/init-baseDN.ldif
$DCM4CHEE_ARC/ldap/init-config.ldif
$DCM4CHEE_ARC/ldap/default-config.ldif
$DCM4CHEE_ARC/ldap/default-ui-config.ldif <---ERROR
$DCM4CHEE_ARC/ldap/add-vendor-data.ldif
only default-ui-config.ldif gives me this error.