{% extends 'base.html' %}
{% load i18n %}
{% load form_as_div %}

{% block content %}
<div class="page-header">
    <h1>{% block title %}{% trans 'Registration' %}{% endblock %}</h1>
</div>

<p class="lead">
    {% blocktrans %}
    Want to register a team for {{ COMPETITION_NAME }}? There you go:
    {% endblocktrans %}
</p>

<form action="." method="post">
    {% csrf_token %}

    {{ user_form|as_div }}
    {{ team_form|as_div }}

    <button type="submit" class="btn btn-primary">{% trans 'Register' %}</button>
</form>
{% endblock %}

{% extends 'base.html' %}
{% load i18n %}
{% load form_as_div %}

{% block content %}
<div class="page-header">
    <h1>{% block title %}{% trans 'Registration' %}{% endblock %}</h1>
</div>

<p class="lead">
    {% blocktrans %}
    Want to register a team for {{ COMPETITION_NAME }}? There you go:
    {% endblocktrans %}
</p>

<form method="post">
    {% csrf_token %}

    {{ user_form|as_div }}
    {{ team_form|as_div }}

    <button type="submit" class="btn btn-primary">{% trans 'Register' %}</button>
</form>
{% endblock %}

Remove 'action' attribute from HTML form element
Remove 'action' attribute from HTML form element

Omitting it entirely is the safest option when posting to the current
site according to https://stackoverflow.com/a/1132015.
