Не получается добавить navbar тегом include в base.html, в чём может быть проблема?

base.html

<!doctype html>
<html lang="en">
<head>

    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css"
          integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
    <title>{% block title %} {% endblock %}</title>
</head>
<body>

    {% include 'inc/_nav.html' %}

<div class="container mt-3">
    <div class="row">

        <div class="col-md-3">
            {% block sidebar %}SIDEBAR{% endblock %}
        </div>

        <div class="col-md-9">
            {% block content %}CONTENT{% endblock %}
        </div>

    </div>
</div>

[лог ошибки]:

TemplateSyntaxError at /
Invalid block tag on line 13: 'include'. Did you forget to register or load this tag?
Request Method: GET
Request URL:    http://127.0.0.1:8000/
Django Version: 4.0.6
Exception Type: TemplateSyntaxError
Exception Value:    
Invalid block tag on line 13: 'include'. Did you forget to register or load this tag?
Exception Location: D:\Python\django-sites\testsite\venv\lib\site-packages\django\template\base.py, line 568, in invalid_block_tag
Python Executable:  D:\Python\django-sites\testsite\venv\Scripts\python.exe
Python Version: 3.10.5
Python Path:    
['D:\\Python\\django-sites\\testsite\\mysite',
 'C:\\Program Files\\Python39\\python310.zip',
 'C:\\Program Files\\Python39\\DLLs',
 'C:\\Program Files\\Python39\\lib',
 'C:\\Program Files\\Python39',
 'D:\\Python\\django-sites\\testsite\\venv',
 'D:\\Python\\django-sites\\testsite\\venv\\lib\\site-packages']
Server time:    Sat, 06 Aug 2022 16:57:45 +0000
Error during template rendering
In template D:\Python\django-sites\testsite\mysite\templates\base.html, error at line 13

Invalid block tag on line 13: 'include'. Did you forget to register or load this tag?
3   <head>
4   
5       <meta charset="utf-8">
6       <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
7       <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css"
8             integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
9       <title>{% block title %} {% endblock %}</title>
10  </head>
11  <body>
12  
13      {% include 'inc/_nav.html' %}
14      ./manage.py compress --traceback 
15  
16  <div class="container mt-3">
17      <div class="row">
18  
19          <div class="col-md-3">
20              {% block sidebar %}SIDEBAR{% endblock %}
21          </div>
22  
23          <div class="col-md-9">
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