Invalid block tag. Did you forget to register or load this tag?
<p>Getting an invalid block tag message <code>Invalid block tag on line 2: 'out'. Did you forget to register or load this tag?</code> but don't know why. Here's my setup:</p>

<p>graphs.html</p>

<pre><code>{% out %}
</code></pre>

<p>views.py</p>

<pre><code>out = 'something to say'
template = loader.get_template('viz_proj/graphs.html')
context = {
    'out' : out
} 
return HttpResponse(template.render(context, request))
</code></pre>

<p>settings.py</p>

<pre><code>INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'viz_proj'
]
</code></pre>

<p>project heirarchy</p>

<pre><code>viz_proj
|
viz_proj----------------------------------------templates
    |                                              |
    settings.py--views.py--urls.py               graphs.html
</code></pre>