Newsletter section not displaying

[Tim07]

I added the newsletter section but nothing is displaying. I tried to add debug inside the newsletter liquid file and here's the result. Do you have an idea why my blocks are empty ?

{{ 'component-newsletter.css' | asset_url | stylesheet_tag }}
{{ 'newsletter-section.css' | asset_url | stylesheet_tag }}

<div>section: {{ section }}</div>
<div>blocks: {{ section.blocks }}</div>

<div class="newsletter center{% if section.settings.full_width == false %} newsletter--narrow page-width{% endif%}">
  <div class="newsletter__wrapper color-{{ section.settings.color_scheme }} gradient">

    <div>section: {{ section }}</div>
    <div>blocks: {{ section.blocks }}</div>
    
    {%- for block in section.blocks -%}
      {%- case block.type -%}
        {%- when '@app' -%}
          block
          {% render block %}
        {%- when 'heading' -%}
          heading
          <h2 class="h1" {{ block.shopify_attributes }}>{{ block.settings.heading | escape }}</h2>
        {%- when 'paragraph' -%}
        paragraph
          <div class="newsletter__subheading rte" {{ block.shopify_attributes }}>{{ block.settings.text }}</div>
        {%- when 'email_form' -%}
          email_form
          <div {{ block.shopify_attributes }}>
            {% form 'customer', class: 'newsletter-form' %}
              <input type="hidden" name="contact[tags]" value="newsletter">
            {% endform %}
          </div>
      {%- endcase -%}
    {%- endfor -%}
  </div>
</div>

{% schema %}
{
  "name": "t:sections.newsletter.name",
  "tag": "section",
  "class": "spaced-section spaced-section--full-width",
  "settings": [
    {
      "type": "select",
      "id": "color_scheme",
      "options": [
        {
          "value": "accent-1",
          "label": "t:sections.newsletter.settings.color_scheme.options__1.label"
        },
        {
          "value": "accent-2",
          "label": "t:sections.newsletter.settings.color_scheme.options__2.label"
        },
        {
          "value": "background-1",
          "label": "t:sections.newsletter.settings.color_scheme.options__3.label"
        },
        {
          "value": "background-2",
          "label": "t:sections.newsletter.settings.color_scheme.options__4.label"
        },
        {
          "value": "inverse",
          "label": "t:sections.newsletter.settings.color_scheme.options__5.label"
        }
      ],
      "default": "background-1",
      "label": "t:sections.newsletter.settings.color_scheme.label"
    },
    {
      "type": "checkbox",
      "id": "full_width",
      "default": true,
      "label": "t:sections.newsletter.settings.full_width.label"
    },
    {
      "type": "paragraph",
      "content": "t:sections.newsletter.settings.paragraph.content"
    }
  ],
  "blocks": [
    {
      "type": "heading",
      "name": "t:sections.newsletter.blocks.heading.name",
      "limit": 1,
      "settings": [
        {
          "type": "text",
          "id": "heading",
          "default": "Subscribe to our emails",
          "label": "t:sections.newsletter.blocks.heading.settings.heading.label"
        }
      ]
    },
    {
      "type": "paragraph",
      "name": "t:sections.newsletter.blocks.paragraph.name",
      "limit": 1,
      "settings": [
        {
          "type": "richtext",
          "id": "text",
          "default": "<p>Be the first to know about new collections and exclusive offers.</p>",
          "label": "t:sections.newsletter.blocks.paragraph.settings.paragraph.label"
        }
      ]
    },
    {
      "type": "email_form",
      "name": "t:sections.newsletter.blocks.email_form.name",
      "limit": 1
    },
    {
      "type": "@app"
    }
  ]
}
{% endschema %}