Connection error when using Hibernate logs

I'm trying to see the sqls generated by Hibernate in my JAVA application but I'm having problems because adding the two commands below throws some exceptions.

Commands I'm inserting in persistence.xml:

  <property name="hibernate.show_sql">true</property> <!-- Show SQL in console -->
  <property name="hibernate.format_sql">true</property> <!-- Show SQL formatted -->

My complete persistence.xml looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="XXXXXX" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
      <property name="hibernate.connection.username" value="postgres"/>
      <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
      <property name="hibernate.connection.password" value="root"/>
      <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/xxxx_new"/>
      <property name="hibernate.connection.autocommit" value="true"/>
      <property name="hibernate.cache.use_query_cache" value="false"/>
      <property name="hibernate.cache.use_second_level_cache" value="false"/>
      <property name="hibernate.hbm2ddl.auto" value="update"/>
      <property name="javax.persistence.sql-load-script-source" value="&lt;property name=&quot;hibernate.show_sql&quot;&gt;true&lt;/property&gt;"/>                         
        <property name="hibernate.show_sql">true</property> <!-- sem essas duas linhs funciona -->
        <property name="hibernate.format_sql">true</property> <!-- sem essas duas linhs funciona -->
    </properties>
  </persistence-unit>
</persistence>

When I add the 2 lines to see the log I have the following Exception:

javax.persistence.PersistenceException: Invalid persistence.xml.
Error parsing XML [line : -1, column : -1] : cvc-complex-type.4: O atributo 'value' deve aparecer no elemento 'property'.
Error parsing XML [line : -1, column : -1] : cvc-complex-type.2.1: O elemento 'property' não deve ter um caractere ou um item com informações do elemento [children] porque o tipo de conteúdo do tipo é vazio.
Error parsing XML [line : -1, column : -1] : cvc-complex-type.4: O atributo 'value' deve aparecer no elemento 'property'.
Error parsing XML [line : -1, column : -1] : cvc-complex-type.2.1: O elemento 'property' não deve ter um caractere ou um item com informações do elemento [children] porque o tipo de conteúdo do tipo é vazio.