Get the source code from Github    -    or the bookmarklet

Result:

https://doonungth.com/category/%E0%B8%8B%E0%B8%B5%E0%B8%A3%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B9%8C%E0%B8%9D%E0%B8%A3%E0%B8%B1%E0%B9%88%E0%B8%87/
Array
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    [date] => Fri, 27 Jan 2023 08:06:22 GMT
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    [vary] => Accept-Encoding
    [server] => cloudflare
    [cf-ray] => 78fffd19a90ac219-VIE
    [content-encoding] => gzip
    [alt-svc] => h3=":443"; ma=86400, h3-29=":443"; ma=86400
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Array
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    [namelookup_time] => 0.029115
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    [speed_upload] => 0
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    [upload_content_length] => -1
    [starttransfer_time] => 0.088826
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 188.114.97.3
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 37330
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
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<!DOCTYPE html>
<html lang="en-US">
   <head>
      <title>Access denied</title>
      <meta http-equiv="X-UA-Compatible" content="IE=Edge" />
      <meta name="robots" content="noindex, nofollow" />
      <meta name="viewport" content="width=device-width,initial-scale=1" />
      <link rel="stylesheet" href="/cdn-cgi/styles/errors.css" media="screen" />
      <script>
(function(){if(document.addEventListener&&window.XMLHttpRequest&&JSON&&JSON.stringify){var e=function(a){var c=document.getElementById("error-feedback-survey"),d=document.getElementById("error-feedback-success"),b=new XMLHttpRequest;a={event:"feedback clicked",properties:{errorCode:1020,helpful:a,version:5}};b.open("POST","https://sparrow.cloudflare.com/api/v1/event");b.setRequestHeader("Content-Type","application/json");b.setRequestHeader("Sparrow-Source-Key","c771f0e4b54944bebf4261d44bd79a1e");
b.send(JSON.stringify(a));c.classList.add("feedback-hidden");d.classList.remove("feedback-hidden")};document.addEventListener("DOMContentLoaded",function(){var a=document.getElementById("error-feedback"),c=document.getElementById("feedback-button-yes"),d=document.getElementById("feedback-button-no");"classList"in a&&(a.classList.remove("feedback-hidden"),c.addEventListener("click",function(){e(!0)}),d.addEventListener("click",function(){e(!1)}))})}})();
</script>

      <script>
      (function(){function d(c){var b=document.getElementById("copy-label"),a=document.getElementById("cf-details-wrapper-expandable");c.target.checked?a.classList.add("expanded"):(a.classList.remove("expanded"),b.innerText="Click to copy")}if(document.addEventListener){var e=function(){var c=document.getElementById("copy-label");var b=document.getElementById("error-details").textContent;if(navigator.clipboard)navigator.clipboard.writeText(b);else{var a=document.createElement("textarea");a.value=b;a.style.top="0";a.style.left="0";a.style.position="fixed";document.body.appendChild(a);a.focus();a.select();document.execCommand("copy");document.body.removeChild(a)}c.innerText="Copied text to clipboard"};document.addEventListener("DOMContentLoaded",function(){var c=document.getElementById("error-details-checkbox"),b=document.getElementById("click-to-copy-btn");document.getElementById("copy-label").classList.remove("hidden");c.addEventListener("change",d);b.addEventListener("click",e)})}})();
      </script>
      <script defer src="https://performance.radar.cloudflare.com/beacon.js"></script>
   </head>
   <body>
   <div class="cf-main-wrapper" role="main">
      <div class="cf-header cf-section">
         <div class="cf-error-title">
            <h1>Access denied</h1>
            <span class="cf-code-label">Error code <span>1020</span></span>
         </div>
         <div class="cf-error-description">
            <p>You do not have access to doonungth.com.</p><p>The site owner may have set restrictions that prevent you from accessing the site.</p>
         </div>
      </div>
   </div>

   <div class="cf-details-wrapper">
      <div class="cf-section" role="region">
         <div class="cf-expandable" id="cf-details-wrapper-expandable">
            <label for="error-details-checkbox" title="Error details" class="cf-expandable-btn">
               <p class="cf-dropdown-title">Error details</p>
               <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgBAMAAACBVGfHAAAAElBMVEUAAAAwMDAxMTEyMjIwMDAxMTF+89HTAAAABXRSTlMAf2CAMKS61bwAAABTSURBVCjPzcq7DcAgFENR5zMATfo06TNCViAS+6+CeFi6gglw4eLqaPVtaQpXnkApaQT/k0dw70EAUhCA1AnABGACMAGYAEwAkCOAydv+I5xaZhXWbQrD80TkkQAAAABJRU5ErkJggg=="
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            </label>

            <input id="error-details-checkbox" class="hidden" type="checkbox">

            <div class="cf-expandable-error-info hidden">
               <p class="cf-error-copy-description">Provide the site owner this information.</p>
               <button class="cf-click-to-copy-btn" id="click-to-copy-btn" title="Click to copy" type="button">
<div class="cf-error-wrapper" id="error-details"><p class="cf-error-details-endpoint">I got an error when visiting doonungth.com/category/%E0%B8%8B%E0%B8%B5%E0%B8%A3%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B9%8C%E0%B8%9D%E0%B8%A3%E0%B8%B1%E0%B9%88%E0%B8%87/.</p>

<p>Error code: 1020</p>
<p>Ray ID: 78fffd19a90ac219</p>
<p>Country: DE</p>
<p>Data center: vie02</p>
<p>IP: 78.47.42.177</p>
<p>Timestamp: 2023-01-27 08:06:22 UTC</p>
</div>
                  <p class="cf-copy-label hidden" id="copy-label">Click to copy</p>
               </button>
            </div>
         </div>
      </div>

      <div class="clearfix cf-footer cf-section" role="contentinfo">
      <div class="cf-column">
           <div class="feedback-hidden py-8 text-center" id="error-feedback">
    <div id="error-feedback-survey" class="footer-line-wrapper">
        Was this page helpful?
        <button class="border border-solid bg-white cf-button cursor-pointer ml-4 px-4 py-2 rounded" id="feedback-button-yes" type="button">Yes</button>
        <button class="border border-solid bg-white cf-button cursor-pointer ml-4 px-4 py-2 rounded" id="feedback-button-no" type="button">No</button>
    </div>
    <div class="feedback-success feedback-hidden" id="error-feedback-success">
        Thank you for your feedback!
    </div>
</div>

      </div>
         <div class="cf-column cf-footer-line-wrapper text-center">
            <p>
               Performance &amp; security by <a rel="noopener noreferrer" href="https://www.cloudflare.com?utm_source=1020_error" target="_blank">Cloudflare <img class="external-link" title="Opens in new tab" src="/cdn-cgi/images/external.png" alt="External link"></a>
            </p>
         </div>
      </div>
   </div>
</body>
</html>
https://doonungth.com/category/%E0%B8%8B%E0%B8%B5%E0%B8%A3%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B9%8C%E0%B8%9D%E0%B8%A3%E0%B8%B1%E0%B9%88%E0%B8%87/
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    [content-encoding] => gzip
    [alt-svc] => h3=":443"; ma=86400, h3-29=":443"; ma=86400
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Array
(
    [url] => https://doonungth.com/category/%E0%B8%8B%E0%B8%B5%E0%B8%A3%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B9%8C%E0%B8%9D%E0%B8%A3%E0%B8%B1%E0%B9%88%E0%B8%87/
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    [http_code] => 403
    [header_size] => 821
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    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.056963
    [namelookup_time] => 5.0E-5
    [connect_time] => 0.009446
    [pretransfer_time] => 0.04108
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    [size_download] => 2220
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    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0.056485
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 188.114.97.3
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 37332
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
)
<!DOCTYPE html>
<html lang="en-US">
   <head>
      <title>Access denied</title>
      <meta http-equiv="X-UA-Compatible" content="IE=Edge" />
      <meta name="robots" content="noindex, nofollow" />
      <meta name="viewport" content="width=device-width,initial-scale=1" />
      <link rel="stylesheet" href="/cdn-cgi/styles/errors.css" media="screen" />
      <script>
(function(){if(document.addEventListener&&window.XMLHttpRequest&&JSON&&JSON.stringify){var e=function(a){var c=document.getElementById("error-feedback-survey"),d=document.getElementById("error-feedback-success"),b=new XMLHttpRequest;a={event:"feedback clicked",properties:{errorCode:1020,helpful:a,version:5}};b.open("POST","https://sparrow.cloudflare.com/api/v1/event");b.setRequestHeader("Content-Type","application/json");b.setRequestHeader("Sparrow-Source-Key","c771f0e4b54944bebf4261d44bd79a1e");
b.send(JSON.stringify(a));c.classList.add("feedback-hidden");d.classList.remove("feedback-hidden")};document.addEventListener("DOMContentLoaded",function(){var a=document.getElementById("error-feedback"),c=document.getElementById("feedback-button-yes"),d=document.getElementById("feedback-button-no");"classList"in a&&(a.classList.remove("feedback-hidden"),c.addEventListener("click",function(){e(!0)}),d.addEventListener("click",function(){e(!1)}))})}})();
</script>

      <script>
      (function(){function d(c){var b=document.getElementById("copy-label"),a=document.getElementById("cf-details-wrapper-expandable");c.target.checked?a.classList.add("expanded"):(a.classList.remove("expanded"),b.innerText="Click to copy")}if(document.addEventListener){var e=function(){var c=document.getElementById("copy-label");var b=document.getElementById("error-details").textContent;if(navigator.clipboard)navigator.clipboard.writeText(b);else{var a=document.createElement("textarea");a.value=b;a.style.top="0";a.style.left="0";a.style.position="fixed";document.body.appendChild(a);a.focus();a.select();document.execCommand("copy");document.body.removeChild(a)}c.innerText="Copied text to clipboard"};document.addEventListener("DOMContentLoaded",function(){var c=document.getElementById("error-details-checkbox"),b=document.getElementById("click-to-copy-btn");document.getElementById("copy-label").classList.remove("hidden");c.addEventListener("change",d);b.addEventListener("click",e)})}})();
      </script>
      <script defer src="https://performance.radar.cloudflare.com/beacon.js"></script>
   </head>
   <body>
   <div class="cf-main-wrapper" role="main">
      <div class="cf-header cf-section">
         <div class="cf-error-title">
            <h1>Access denied</h1>
            <span class="cf-code-label">Error code <span>1020</span></span>
         </div>
         <div class="cf-error-description">
            <p>You do not have access to doonungth.com.</p><p>The site owner may have set restrictions that prevent you from accessing the site.</p>
         </div>
      </div>
   </div>

   <div class="cf-details-wrapper">
      <div class="cf-section" role="region">
         <div class="cf-expandable" id="cf-details-wrapper-expandable">
            <label for="error-details-checkbox" title="Error details" class="cf-expandable-btn">
               <p class="cf-dropdown-title">Error details</p>
               <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgBAMAAACBVGfHAAAAElBMVEUAAAAwMDAxMTEyMjIwMDAxMTF+89HTAAAABXRSTlMAf2CAMKS61bwAAABTSURBVCjPzcq7DcAgFENR5zMATfo06TNCViAS+6+CeFi6gglw4eLqaPVtaQpXnkApaQT/k0dw70EAUhCA1AnABGACMAGYAEwAkCOAydv+I5xaZhXWbQrD80TkkQAAAABJRU5ErkJggg=="
               class="cf-caret-icon" id="caret-icon" alt="Caret icon" />
            </label>

            <input id="error-details-checkbox" class="hidden" type="checkbox">

            <div class="cf-expandable-error-info hidden">
               <p class="cf-error-copy-description">Provide the site owner this information.</p>
               <button class="cf-click-to-copy-btn" id="click-to-copy-btn" title="Click to copy" type="button">
<div class="cf-error-wrapper" id="error-details"><p class="cf-error-details-endpoint">I got an error when visiting doonungth.com/category/%E0%B8%8B%E0%B8%B5%E0%B8%A3%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B9%8C%E0%B8%9D%E0%B8%A3%E0%B8%B1%E0%B9%88%E0%B8%87/.</p>

<p>Error code: 1020</p>
<p>Ray ID: 78fffd1a0fee789d</p>
<p>Country: DE</p>
<p>Data center: vie02</p>
<p>IP: 78.47.42.177</p>
<p>Timestamp: 2023-01-27 08:06:23 UTC</p>
</div>
                  <p class="cf-copy-label hidden" id="copy-label">Click to copy</p>
               </button>
            </div>
         </div>
      </div>

      <div class="clearfix cf-footer cf-section" role="contentinfo">
      <div class="cf-column">
           <div class="feedback-hidden py-8 text-center" id="error-feedback">
    <div id="error-feedback-survey" class="footer-line-wrapper">
        Was this page helpful?
        <button class="border border-solid bg-white cf-button cursor-pointer ml-4 px-4 py-2 rounded" id="feedback-button-yes" type="button">Yes</button>
        <button class="border border-solid bg-white cf-button cursor-pointer ml-4 px-4 py-2 rounded" id="feedback-button-no" type="button">No</button>
    </div>
    <div class="feedback-success feedback-hidden" id="error-feedback-success">
        Thank you for your feedback!
    </div>
</div>

      </div>
         <div class="cf-column cf-footer-line-wrapper text-center">
            <p>
               Performance &amp; security by <a rel="noopener noreferrer" href="https://www.cloudflare.com?utm_source=1020_error" target="_blank">Cloudflare <img class="external-link" title="Opens in new tab" src="/cdn-cgi/images/external.png" alt="External link"></a>
            </p>
         </div>
      </div>
   </div>
</body>
</html>

Fatal error: Uncaught Embed\Exceptions\InvalidUrlException: Invalid url 'https://doonungth.com/category/%E0%B8%8B%E0%B8%B5%E0%B8%A3%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B9%8C%E0%B8%9D%E0%B8%A3%E0%B8%B1%E0%B9%88%E0%B8%87/' (Status code 403) in /var/www/oscarotero.com/www/embed3/src/Embed.php:142 Stack trace: #0 /var/www/oscarotero.com/www/embed3/src/Embed.php(81): Embed\Embed::process() #1 /var/www/oscarotero.com/www/embed3/demo/index.php(216): Embed\Embed::create() #2 {main} thrown in /var/www/oscarotero.com/www/embed3/src/Embed.php on line 142