Django: Invalid block tag on line 5: 'static', expected 'endblock'. Did you forget to register or load this tag?

错误释义：在第5行中无效的块标签:'static'，期望的'endblock'。你忘记登记或装载这个标签了吗?

错误原因：没有引入static文件

{% extends 'base.html' %}
{% load static %}

{% block ext_css %}
    {{block.super}}
    <link rel="stylesheet" href="{% static 'axf/main/css/main.css' %}">
{% endblock %}