Why twig code in craftcms can't generate new code on localhost?

Question

In craftCMS I've created a field to load content but this field is not showing up when i change my code in the template. I've checked if I used the correct folder

At first i thought it was the cache but when i go to utilities to clear the cache the same error still occurs. Also when I write any new character other than twig code the browser gives an error with the new code but when I delete it, it's still the same old code

1. Here is my code:

{% extends "index" %} 
{% block content %}
    This is not generate on my local
    <div class="can't load new code below and new class right here"
        {{ entry.headingDescription }}
        {{ entry.headingTitle }}
    </div
{% endblock %}

2. My structure: