Do not mix spaces and tabs indent, even in template files ;)

coin/members/templates/members/registration/login.html

@@ -10,7 +10,7 @@
         <form id="login-form" method="post" action="{% url 'members:django.contrib.auth.views.login' %}">
             {% csrf_token %}
             {% if form.errors %}
-        	<div class="alert-box alert">
+            <div class="alert-box alert">
                 {% if form.errors.items|length == 1 %}
                     {% trans "Please correct the error below." %}{% else %}{% trans "Please correct the errors below." %}
                 {% endif %}<br/>