Custom tag not loaded in template
<p>I've created a custom tag that I want to use, but Django can't seem to find it.  My <code>templatetags</code> directory is set up like this:</p>

<p><a href="https://i.stack.imgur.com/FMI2O.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FMI2O.png" alt=""></a></p>

<p><b>pygmentize.py</b></p>

<pre><code>from pygments import highlight
from pygments.lexers import get_lexer_by_name
from django import template
from pygments.formatters.other import NullFormatter

register = template.Library()

@register.tag(name='code')
def do_code(parser,token):
    code = token.split_contents()[-1]
    nodelist = parser.parse(('endcode',))
    parser.delete_first_token()
    return CodeNode(code,nodelist)

class CodeNode(template.Node):
    def __init__(self,lang,code):
        self.lang = lang
        self.nodelist = code

    def render(self,context):
        code = self.nodelist.render(context)
        lexer = get_lexer_by_name('python')
        return highlight(code,lexer,NullFormatter())
</code></pre>

<p>I am trying to use this tag to render code in <code>gameprofile.html</code>.</p>

<p><b>gameprofile.html</b></p>

<pre><code>(% load pygmentize %}
{% block content %}
    &lt;title&gt;{% block title %} | {{ game.title }}{% endblock %}&lt;/title&gt;
    &lt;div id="gamecodecontainer"&gt;
        {% code %}
            {{game.code}}
        {% endcode %}
    &lt;/div&gt;
{% endblock content %}
</code></pre>

<p>When I navigate to <code>gameprofile.html</code>, I get an error:</p>

<blockquote>
  <p>Invalid block tag on line 23: 'code', expected 'endblock'. Did you forget to register or load this tag?</p>
</blockquote>