Hello Michael,
Could you run the following command:
```
/opt/opendj/bin/ldapmodify --hostname localhost --port 4444 --bindDN "cn=directory manager" --bindPassword <ldap admin password> --useSSL --trustAll --defaultAdd --filename /install/community-edition-setup/output/radius/gluu_radius_server.ldif
```
Restart your gluu server instance and you should be good to go.
That said as Mike pointed out, we don't really recommend Gluu Radius for any high volume authentications--it's single threaded. For larger, mission critical RADIUS deployments, we recommend Radiator which has a connector to Gluu or Super Gluu.
Let me know how it goes for you