Bukkit ebean exception: No ScalarType registered

I'm working on a city/civilization plugin. I'm trying to do a query that returns a list of cities in that civilization but the following exception is being thrown

Code:

javax.persistence.PersistenceException: No ScalarType registered for class net.croxis.plugins.civilmineation.components.CivilizationComponent$$EntityBean$Civilmineation
        at com.avaje.ebeaninternal.server.persist.Binder.bindObject(Binder.java:183)
        at com.avaje.ebeaninternal.server.query.CQueryPredicates.bind(CQueryPredicates.java:162)
        at com.avaje.ebeaninternal.server.query.CQuery.prepareBindExecuteQuery(CQuery.java:413)
        at com.avaje.ebeaninternal.server.query.CQueryEngine.findMany(CQueryEngine.java:198)
        at com.avaje.ebeaninternal.server.query.DefaultOrmQueryEngine.findMany(DefaultOrmQueryEngine.java:104)
        at com.avaje.ebeaninternal.server.core.OrmQueryRequest.findList(OrmQueryRequest.java:344)
        at com.avaje.ebeaninternal.server.core.DefaultServer.findList(DefaultServer.java:1469)
        at com.avaje.ebeaninternal.server.querydefn.DefaultOrmQuery.findList(DefaultOrmQuery.java:906)
        at com.avaje.ebeaninternal.util.DefaultExpressionList.findList(DefaultExpressionList.java:201)
        at net.croxis.plugins.civilmineation.CivAPI.disbandCity(CivAPI.java:513)

Here is my query:

Code:

List<CityComponent> cities = plugin.getDatabase().find(CityComponent.class).where().eq("civ", civ).findList();

Part of CityComponent.jar:

Code:

@Entity()
@Table(name = "civ_city")
public class CityComponent{
    @Id
    private int id;
    @OneToOne(fetch = FetchType.LAZY)
    private Ent entityID;
    private String name;
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name="CIVILIZATION_ID")
    private CivilizationComponent civilization;

And CivilizationComponent.jar:

Code:

@Entity()
@Table(name = "civ_civilization")
public class CivilizationComponent{
    @Id
    private int id;
    @OneToOne(fetch = FetchType.LAZY)
    private Ent entityID;
    private String name;
    @OneToMany(mappedBy="civilization", fetch = FetchType.LAZY)
    private List<CityComponent> cities = new ArrayList<CityComponent>();

Thanks for any help!