Deleted file- now webpage wont open/load

I’m creating a webpage/blog page for a final project in webdesign class, and I accidentally deleted a folder in the left-hand side of the IDE underneath “files” that I apparently needed for the webpage to load. I cannot remember the name of the file, nor can I restore the revision version history to the correct version before deletion. Can someone help me figure out what file I need to recreate to make my webpage function? The error it throws when i try to load on the webpage in webview is “not found” with a picture of a pair of binoculars.
Here is the the main index.html file of the program:

<!DOCTYPE html>
<html>
<head>
<title>Tim Anderson's Blog</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Raleway">
<style>
body,h1,h2,h3,h4,h5 {font-family: "Raleway", sans-serif}
  .w3-card {
  background-color: #e0f7fa;
</style>
</head>
<body class="w3-light-grey">

<!-- w3-content defines a container for fixed size centered content, 
and is wrapped around the whole page content, except for the footer in this example -->
<div class="w3-content" style="max-width:1400px">

<!-- Header -->
<header class="w3-container w3-center w3-padding-32"> 
  <h1><b>The AI Horizons-Blog</b></h1>
  <p>Welcome to the blog of <span class="w3-tag">Luke Anderson</span></p>
</header>

<!-- Grid -->
<div class="w3-row">

<!-- Blog entries -->
<div class="w3-col l8 s12">
  <!-- Blog entry -->
  <div class="w3-card-4 w3-margin w3-white">
    <img src="upload://2iCQHtQEZMISJMHYReaxPaE9OPu.jpeg" alt="AI stock image" style="width:100%">
    <div class="w3-container">
      <h3><b>The Mission</b></h3>
      <h5>The AI Halo affect, <span class="w3-opacity">December 03, 2023</span></h5>
    </div>

    <div class="w3-container">
      <p>Welcome to the AI Horizons, in this blog, I will talk about the ever-evolving realm of artificial intelligence, and innovative technology! My blog is your go-to resource for exploring the profound impacts of AI on industries, society, and the very fabric of our lives.</p>
      <p>Here, we delve into the intricate web of AI's reach, examining its implications, possibilities, and ethical considerations. In this blog I will discuss my hobbys, interests, and passions. </p>
      <div class="w3-row">
        <div class="w3-col m8 s12">
          <p><button class="w3-button w3-padding-large w3-white w3-border"><b>READ MORE »</b></button></p>
        </div>
        <div class="w3-col m4 w3-hide-small">
        </div>
      </div>
    </div>
  </div>
  <hr>

  <!-- Blog entry -->
  <div class="w3-card-4 w3-margin w3-white">
  <img src="upload://tpKchfXhsZB3NEzGEOiyyc76ijh.jpeg" alt="Coding stock image" style="width:100%">
    <div class="w3-container">
      <h3><b>BLOG ENTRY</b></h3>
      <h5>The Implications and Long-term Downstream Effects of AI on Education, <span class="w3-opacity">December 2nd, 2023</span></h5>
    </div>

    <div class="w3-container">
    <p>https://docs.google.com/document/d/e/2PACX-1vQKHm8whPOiNBxnVSt2qU3CYuPropfQ7ivaIL7w5hD3UXV28kQaFT7hYGcLX4_1dsBHAdJZUHWWpPW5/pub</p>
      <div class="w3-row">
        <div class="w3-col m8 s12">
          <p><button class="w3-button w3-padding-large w3-white w3-border"><b>READ MORE »</b></button></p>
        </div>
        <div class="w3-col m4 w3-hide-small">
          <p><span class="w3-padding-large w3-right"><b>Comments  </b> <span class="w3-badge">2</span></span></p>
        </div>
      </div>
    </div>
  </div>
<!-- END BLOG ENTRIES -->
</div>

<!-- Introduction menu -->
<div class="w3-col l4">
  <!-- About Card -->
  <div class="w3-card w3-margin w3-margin-top">
  <img src="upload://skkqowZCP4jPmyxVAjpjXm8hxaT.jpeg" style="width:100%">
    <div class="w3-container w3-white">
      <h4><b>Who am I, What am I? </b></h4>
      <p>I am a full time college student pursuing a bachelors of science degree in the discipline of computer science with an emphasis in machine learning enginerring and a desire to minor in physics/statistcal mechanics. I am currentlly in the second semester of my freshman year at UAPTC.</p>
<p> I have a passion for hardware, robotic and autonomous systems. I like to build projects that have a challenging engineering problem to solve. Engineering is a passion of mine that stems from the desire to understand the language of the universe, Mathematics and physics. Some other subjects I enjoy are finance, BCI, programming, and advanced manufacturing. </p>
    </div>
  </div><hr>

  <!-- Posts -->
  <div class="w3-card w3-margin">
    <div class="w3-container w3-padding">
      <h4>Popular Posts</h4>
    </div>
    <ul class="w3-ul w3-hoverable w3-white">
      <li class="w3-padding-16">
        <img src="upload://hu7LJlLtudTNSJsXfVvRiB7cUcM.jpeg" alt="Image" class="w3-left w3-margin-right" style="width:50px">
        <span class="w3-large">NZS Capital Blog post</span><br>
        <span>https://www.nzscapital.com/sitalweek/sitalweek-379</span>
      </li>
      <li class="w3-padding-16">
        <img src="upload://Lo4LR5lmzOVbjLeKaUxw0ix3S2.jpeg" alt="Image" class="w3-left w3-margin-right" style="width:50px">
        <span class="w3-large">AI in material synthesis and generation Scholarly Paper</span><br>
        <span>https://www.nature.com/articles/s41586-023-06734-w#Abs1</span>
      </li> 
      <li class="w3-padding-16">
        <img src="upload://wL9DgzVkyxyExUluiREOltpJyC0.jpeg" alt="Image" class="w3-left w3-margin-right" style="width:50px">
        <span class="w3-large">Department of Education: Report on AI and the future of learning</span><br>
        <span>https://tech.ed.gov/files/2023/05/ai-future-of-teaching-and-learning-report.pdf</span>
      </li>   
    </ul>
    <p><a href="Popular-post.html"><button class="w3-button w3-padding-large w3-white w3-border"><b>Read More »</b></button></a></p>
  </div>
  <hr> 

  <!-- Hobbies, Interests, and Projects -->
  <div class="w3-card w3-margin">
    <div class="w3-container w3-padding">
    <img src="upload://mvuHpIhgczqq28L4MNV1o42XEgN.png" alt="Coding stock image" style="width:100%">
      <h4>Hobbies, Interests, and Projects</h4>
    </div>
    <div class="w3-container w3-white">
      <p>Here you can find details about my hobbies, various interests, and projects I have been working on.</p>
    <p><a href="hobbies-interests-projects.html"><button class="w3-button w3-padding-large w3-white w3-border"><b>Read More »</b></button></a></p>
      <!-- Content related to Hobbies, Interests, and Projects -->
    </div>
  </div>
  <hr>
  <!-- Goals, Skills, and Passions -->
  <div class="w3-card w3-margin">
    <div class="w3-container w3-padding">
      <img src="upload://nv9vIWoYd0IAmi9o6rmaVKXW5fZ.webp" alt="Coding stock image" style="width:100%">
      <h4>Goals, Skills, and Passions</h4>
    </div>
    <div class="w3-container w3-white">
      <p>This page is dedicated to discussing my personal goals, the skills I am developing, and the passions that drive me.</p>
      <p><a href="Goals-skills-passions.html"><button class="w3-button w3-padding-large w3-white w3-border"><b>Read More »</b></button></a></p>
      <!-- Content related to Goals, Skills, and Passions -->
    </div>
  </div>
  <hr>
  
  <!-- Labels / tags -->
  <div class="w3-card w3-margin">
    <div class="w3-container w3-padding">
      <h4>Tags</h4>
    </div>
    <div class="w3-container w3-white">
<p><span class="w3-tag w3-black w3-margin-bottom">AI</span> 
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Artificial Intelligence</span> 
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">AGI</span>
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">ASI</span>
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">General Intelligence</span> 
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">LLMs</span>
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Super Intelligence</span> 
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">ASI</span> 
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Education</span>
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Economy</span>    <span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Finance</span> <span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Government</span>
<span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Regulation</span> <span class="w3-tag w3-light-grey w3-small w3-margin-bottom">Hardware and Software</span>
    </p>
    </div>
  </div>

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after an hour of messing around i restarted the webview tab within the IDE and it worked and solved the problem .

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