Get the source code from Github    -    or the bookmarklet

Result:

https://mybookbee.com/
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    [server] => cloudflare
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    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.090681
    [namelookup_time] => 0.028475
    [connect_time] => 0.038679
    [pretransfer_time] => 0.071712
    [size_upload] => 0
    [size_download] => 7963
    [speed_download] => 88477
    [speed_upload] => 0
    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0.090273
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 188.114.97.3
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 42138
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
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<!DOCTYPE html>
<html lang="en-US">
<head>
    <title>Just a moment...</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=Edge" />
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<body class="no-js">

    <div class="main-wrapper" role="main">
    <div class="main-content">
        <h1 class="zone-name-title h1">
            <img class="heading-favicon" src="/favicon.ico"
                 onerror="this.onerror=null;this.parentNode.removeChild(this)" />
            mybookbee.com
        </h1>
        <h2 class="h2" id="cf-challenge-running">
            Checking if the site connection is secure
        </h2>
        <noscript>
            <div id="cf-challenge-error-title">
                <div class="h2">
                  <span class="icon-wrapper">
                      <div class="heading-icon warning-icon"></div>
                  </span>
                    <span id="cf-challenge-error-text">
                    Enable JavaScript and cookies to continue
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                </div>
            </div>
        </noscript>
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            proceeding.
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    <div class="footer" role="contentinfo">
        <div class="footer-inner">
            <div class="clearfix diagnostic-wrapper">
                <div class="ray-id">Ray ID: <code>737f14dd69cec25b</code></div>
            </div>
            <div class="text-center">
                Performance &amp; security by
                <a rel="noopener noreferrer" href="https://www.cloudflare.com" target="_blank">Cloudflare</a>
            </div>
        </div>
    </div>
</body>
</html>

Fatal error: Uncaught Embed\Exceptions\InvalidUrlException: Invalid url 'https://mybookbee.com/' (Status code 503) 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