"not an instance of a persistable class" SDN 4.1.6 - neo4j

Question

I'm new to Java, Neo4j and Spring Data and I'm experiencing some difficulties with the latter.
I'm currently using Spring Data Neo4j 4.1.6. and I have a basic class Person, which is marked with #NodeEntity. It has no-argument constructor and one constructor with String name just for tests.
After a lot of errors I managed to get to the point, where I have a Neo4jTemplate. THE PROBLEM is that when I try to save the Objects of the class Person in the database I get a warning that these are not instances of a persistable class.
e.g. WARN org.neo4j.ogm.session.Neo4jSession - Thread 1:xtractor.Person is not an instance of a persistable class
Here is my Configuration class and Thanks in advance.
package xtractor;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.ogm.session.Session;
import org.neo4j.ogm.session.SessionFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.neo4j.config.Neo4jConfiguration;
import org.springframework.data.neo4j.template.Neo4jOperations;
import org.springframework.data.neo4j.template.Neo4jTemplate;
#Configuration
public class Neo4jConfig extends Neo4jConfiguration{
#Bean
public org.neo4j.ogm.config.Configuration getConfiguration() {
org.neo4j.ogm.config.Configuration config =
new org.neo4j.ogm.config.Configuration();
config.driverConfiguration().
setDriverClassName("org.neo4j.ogm.drivers.embedded.driver.EmbeddedDriver")
.setURI("file:///" + Console.dbLocation + ".db");
return config;
}
#Override
#Bean
public SessionFactory getSessionFactory() {
// with domain entity base package(s)
return new SessionFactory(getConfiguration(), "xtractor.*");//tried everything here
}
#Bean(destroyMethod = "shutdown")
public GraphDatabaseService graphDatabaseService() {
return Console.db; //thats the DatabaseService I use.
}
#Bean
//#Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
public Session getSession() throws Exception{
return super.getSession();
}
#Bean
public Neo4jOperations neo4jTemplate() throws Exception{
return new Neo4jTemplate(getSession());
}
}
Edit: Person.class
I think the problem is that I can't make Neo4j scan for these #NodeEntities
package xtractor;
import org.neo4j.ogm.annotation.*;
#NodeEntity
public class Person {
#GraphId
private Long graphId;
private String firstName;
private String lastName;
private int birthdate;
private String birthplace;
public Person(){
}
public Person(String firstName){
this.firstName = firstName;
System.out.println("Person created");
}
//getters and setters
}