Eleventy – Cannot GET url

I am using eleventy for a personal blog project. My package.json looks like that:

{
  "name": "personal_blog_eleventy",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "eleventy --serve",
    "build": "eleventy",
    "debug": "cross-env ELEVENTY_DEBUG=true npx eleventy"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@11ty/eleventy": "^2.0.1",
    "cross-env": "^7.0.3"
  },
  "dependencies": {
    "@11ty/eleventy-img": "^3.1.0"
  }
}

When running npm run start the _sites directory looks like the following:

My eleventy.js looks like the following:

module.exports = function(eleventyConfig) {

  const { imageShortcode } = require("./_data/image.js");
  eleventyConfig.addNunjucksAsyncShortcode("image", imageShortcode);
  eleventyConfig.addLiquidShortcode("image", imageShortcode);
  eleventyConfig.addJavaScriptFunction("image", imageShortcode);
  

  // Passthrough copy for landing_pages
  eleventyConfig.addPassthroughCopy("landing_pages");
  eleventyConfig.addPassthroughCopy("images");

  // Add a collection for blog posts
  eleventyConfig.addCollection("posts", function(collection) {
    return collection.getFilteredByGlob("posts/*.md");
  });

  return {
    dir: {
      input: 'pages',
      includes: '../_includes', // Change this line to point to the correct _includes folder
      output: "_site"
    },
    passthroughFileCopy: true,
  };
};

My folder structure looks like the following:

.
├── browser_extensions
│   └── url-annotator-extension
│       ├── background_worker.js
├── _data
│   └── image.js
├── images
│   └── 300x200.png
├── _includes
│   ├── blank.njk
│   └── layout.njk
├── landing_pages
│   ├── landing_page-1.njk
│   └── landing_page-2.njk
├── package.json
├── package-lock.json
├── pages
│   ├── index.njk
│   └── projects.njk
├── posts
│   ├── post-1.md
│   └── post-2.md
├── README.md
└── _site
    ├── images
    │   └── 300x200.png
    ├── img
    │   ├── tDnvQu38B3-300.avif
    │   ├── tDnvQu38B3-300.jpeg
    │   └── tDnvQu38B3-300.webp
    ├── index.html
    ├── landing_pages
    │   ├── landing_page-1.njk
    │   └── landing_page-2.njk
    └── projects
        └── index.html

13 directories, 28 files

As you can see my landing_pages do not get compiled correctly and I get the error:

Any suggestions what I am doing wrong?