Add a new block to the Footer - Dawn theme used

Hi @made4Uo Thank you for your suggestion.
Below I copied all the code from the footer.liquid file with your changes, but it doesn’t work. When I write in the box, nothing is seen on the site.

Unfortunately, as you can see, in this footer file, the HTML box that I wrote according to the suggestions of other users still appears and which now does not make me remove it because it gives me this error

Error: New schema is incompatible with the current setting value. Valore non valido per il tipo nel blocco “a1aca5dd-5b5d-4aec-a730-fb5a88b32ebd”. Il tipo deve essere definito nello schema.

{% comment %}theme-check-disable UndefinedObject{% endcomment %}
{{ 'section-footer.css' | asset_url | stylesheet_tag }}

{% javascript %}
  class LocalizationForm extends HTMLElement {
    constructor() {
      super();
      this.elements = {
        input: this.querySelector('input[name="locale_code"], input[name="country_code"]'),
        button: this.querySelector('button'),
        panel: this.querySelector('ul'),
      };
      this.elements.button.addEventListener('click', this.openSelector.bind(this));
      this.elements.button.addEventListener('focusout', this.closeSelector.bind(this));
      this.addEventListener('keyup', this.onContainerKeyUp.bind(this));

      this.querySelectorAll('a').forEach(item => item.addEventListener('click', this.onItemClick.bind(this)));
    }

    hidePanel() {
      this.elements.button.setAttribute('aria-expanded', 'false');
      this.elements.panel.setAttribute('hidden', true);
    }

    onContainerKeyUp(event) {
      if (event.code.toUpperCase() !== 'ESCAPE') return;

      this.hidePanel();
      this.elements.button.focus();
    }

    onItemClick(event) {
      event.preventDefault();
      const form = this.querySelector('form');
      this.elements.input.value = event.currentTarget.dataset.value;
      if (form) form.submit();
    }

    openSelector() {
      this.elements.button.focus();
      this.elements.panel.toggleAttribute('hidden');
      this.elements.button.setAttribute('aria-expanded', (this.elements.button.getAttribute('aria-expanded') === 'false').toString());
    }

    closeSelector(event) {
      const shouldClose = event.relatedTarget && event.relatedTarget.nodeName === 'BUTTON';
      if (event.relatedTarget === null || shouldClose) {
        this.hidePanel();
      }
    }
  }

  customElements.define('localization-form', LocalizationForm);
{% endjavascript %}

{% schema %}
{
  "name": "t:sections.footer.name",
  "blocks": [

{
"name": "custom liquid",
"type": "custom_liquid",
"settings": [
{
"type": "liquid",
"id": "custom_liquid",
"label": "t:sections.custom-liquid.settings.custom_liquid.label",
"info": "t:sections.custom-liquid.settings.custom_liquid.info"
}
]
},

{
  "type": "html_content",
  "name": "HTML Content",
  "settings": [
    {
      "type": "html",
      "id": "html_area",
      "label": "Custom HTML",
      "default": "

Some HTML content

"
    }
  ]
},

{
      "type": "link_list",
      "name": "t:sections.footer.blocks.link_list.name",
      "settings": [
        {
          "type": "text",
          "id": "heading",
          "default": "Quick links",
          "label": "t:sections.footer.blocks.link_list.settings.heading.label",
          "info": "t:sections.footer.blocks.link_list.settings.heading.info"
        },
        {
          "type": "link_list",
          "id": "menu",
          "default": "footer",
          "label": "t:sections.footer.blocks.link_list.settings.menu.label",
          "info": "t:sections.footer.blocks.link_list.settings.menu.info"
        }
      ]
    },
    {
      "type": "text",
      "name": "t:sections.footer.blocks.text.name",
      "settings": [
        {
          "type": "text",
          "id": "heading",
          "default": "Heading",
          "label": "t:sections.footer.blocks.text.settings.heading.label"
        },
        {
          "type": "richtext",
          "id": "subtext",
          "default": "

Share store details, promotions, or brand content with your customers.

",
          "label": "t:sections.footer.blocks.text.settings.subtext.label"
        }
      ]
    },
    {
      "type": "image",
      "name": "Image",
      "settings": [
        {
          "type": "image_picker",
          "id": "image",
          "label": "Image"
        },
        {
          "type": "range",
          "id": "image_width",
          "min": 50,
          "max": 200,
          "step": 5,
          "unit": "px",
          "label": "Image width",
          "default": 100
        },
        {
          "type": "select",
          "id": "alignment",
          "label": "Image alignment on large screen",
          "options": [
            {
              "value": "",
              "label": "Left"
            },
            {
              "value": "center",
              "label": "Center"
            },
            {
              "value": "right",
              "label": "Right"
            }
          ],
          "default": "center"
        }
      ]
    }
  ],
  "settings": [
    {
      "type": "select",
      "id": "color_scheme",
      "options": [
        {
          "value": "accent-1",
          "label": "t:sections.footer.settings.color_scheme.options__1.label"
        },
        {
          "value": "accent-2",
          "label": "t:sections.footer.settings.color_scheme.options__2.label"
        },
        {
          "value": "background-1",
          "label": "t:sections.footer.settings.color_scheme.options__3.label"
        },
        {
          "value": "background-2",
          "label": "t:sections.footer.settings.color_scheme.options__4.label"
        },
        {
          "value": "inverse",
          "label": "t:sections.footer.settings.color_scheme.options__5.label"
        }
      ],
      "default": "background-1",
      "label": "t:sections.footer.settings.color_scheme.label"
    },
    {
      "type": "header",
      "content": "t:sections.footer.settings.header__1.content",
      "info": "t:sections.footer.settings.header__1.info"
    },
    {
      "type": "checkbox",
      "id": "newsletter_enable",
      "default": true,
      "label": "t:sections.footer.settings.newsletter_enable.label"
    },
    {
      "type": "text",
      "id": "newsletter_heading",
      "default": "Subscribe to our emails",
      "label": "t:sections.footer.settings.newsletter_heading.label"
    },
    {
      "type": "header",
      "content": "t:sections.footer.settings.header__2.content",
      "info": "t:sections.footer.settings.header__2.info"
    },
    {
      "type": "checkbox",
      "id": "show_social",
      "default": false,
      "label": "t:sections.footer.settings.show_social.label"
    },
    {
      "type": "header",
      "content": "t:sections.footer.settings.header__3.content",
      "info": "t:sections.footer.settings.header__4.info"
    },
    {
      "type": "checkbox",
      "id": "enable_country_selector",
      "default": true,
      "label": "t:sections.footer.settings.enable_country_selector.label"
    },
    {
      "type": "header",
      "content": "t:sections.footer.settings.header__5.content",
      "info": "t:sections.footer.settings.header__6.info"
    },
    {
      "type": "checkbox",
      "id": "enable_language_selector",
      "default": true,
      "label": "t:sections.footer.settings.enable_language_selector.label"
    },
    {
      "type": "header",
      "content": "t:sections.footer.settings.header__7.content"
    },
    {
      "type": "checkbox",
      "id": "payment_enable",
      "default": true,
      "label": "t:sections.footer.settings.payment_enable.label"
    }
  ],
  "default": {
    "blocks": [
      {
        "type": "link_list"
      },
      {
        "type": "text"
      }
    ]
  }
}
{% endschema %}

Thanks for your patience and suggestions.