Django error: Invalid block tag: expected 'endblock'

Question

In the development environment works normally, already in the production server I have the following error:

Invalid block tag: 'ultimos_produtos', expected 'endblock'

Follow the code excerpt:

{% extends "base.html" %}
{% load shop_tags i18n %}

{% block meta_title %}{% trans "Home" %}{% endblock %}
{% block title %}{% trans "Home" %}{% endblock %}

{% block breadcrumb_menu %}
<li class="active">{% trans "Home" %}</li>
{% endblock %}

{% block main %}

<h3> Em destaque </h3>
{% ultimos_produtos "perfumes" "span2" 3 %}

{% endblock %}

I’m using Django 1.8.16, Mezzanine 4.0.1.

The only difference between environments is that the production environment uses python 2.7.6 and the python 2.7.8 development

Does anyone know what might be going on?