about extending-storefront-block error

Shopware 6 (English) Programming (EN)
1

i use console create plugin:   php bin/console plugin:create PluginQuickStart

and follow https://docs.shopware.com/en/shopware-platform-dev-en/how-to/extending-storefront-block

create     custom/plugins/PluginQuickStart/src/Resources/views/storefront/layout/header/logo.html.twig  file

the file code is:

{% sw_extends '@Storefront/storefront/layout/header/logo.html.twig' %}

{% block layout_header_logo_link %}
    Hello world!
{% endblock %}

when i refresh home page, i get the error:Unfortunately, something went wrong.can tell me why and how fix it

2

ok,i find it.composer.json file need add:

 "require": { "shopware/core": "\*" },