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Result:

https://cool5site.biz/
Array
(
    [date] => Sat, 25 Jun 2022 22:49:20 GMT
    [content-type] => text/html
    [transfer-encoding] => chunked
    [connection] => keep-alive
    [vary] => Accept-Encoding
    [last-modified] => Tue, 10 May 2022 00:12:00 GMT
    [cf-cache-status] => DYNAMIC
    [expect-ct] => max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
    [report-to] => {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=V2SGbEeaF%2BL4k743PFhCcXOKsuQ%2BMhFO6E7%2Fv5HzsjP2FyMocBEactBgwxuUxZpwSpF0AGbaSYaK6ZktAbNszqUowldU%2F0xYvQlkbb1P0cW6dsvVK%2Fg5c97BLxRfs34Z"}],"group":"cf-nel","max_age":604800}
    [nel] => {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
    [server] => cloudflare
    [cf-ray] => 7211417bff66780f-VIE
    [content-encoding] => gzip
    [alt-svc] => h3=":443"; ma=86400, h3-29=":443"; ma=86400
)
Array
(
    [url] => https://cool5site.biz/
    [content_type] => text/html
    [http_code] => 403
    [header_size] => 786
    [request_size] => 115
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.083861
    [namelookup_time] => 0.004302
    [connect_time] => 0.013538
    [pretransfer_time] => 0.042236
    [size_upload] => 0
    [size_download] => 620
    [speed_download] => 7469
    [speed_upload] => 0
    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0.083481
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 104.21.94.130
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 48214
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head>
    <title>403 &mdash; Forbidden</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <meta name="description" content="You do not have permission to view this"/>
    <style type="text/css">
        body {font-size:14px; color:#777777; font-family:arial; text-align:center;}
        h1 {font-size:180px; color:#99A7AF; margin: 70px 0 0 0;}
        h2 {color: #DE6C5D; font-family: arial; font-size: 20px; font-weight: bold; letter-spacing: -1px; margin: -3px 0 39px;}
        p {width:320px; text-align:center; margin-left:auto;margin-right:auto; margin-top: 30px }
        div {width:320px; text-align:center; margin-left:auto;margin-right:auto;}
        a:link {color: #34536A;}
        a:visited {color: #34536A;}
        a:active {color: #34536A;}
        a:hover {color: #34536A;}
    </style>
</head>

<body>
    <p><a href="https://cool5site.biz/">cool5site.biz</a></p>

    <h1>403</h1>
    <h2>Forbidden</h2>
    <div>
        Unfortunately, you do not have permission to view this
    </div>
</body>

</html>
https://cool5site.biz/
Array
(
    [date] => Sat, 25 Jun 2022 22:49:20 GMT
    [content-type] => text/html
    [transfer-encoding] => chunked
    [connection] => keep-alive
    [vary] => Accept-Encoding
    [last-modified] => Tue, 10 May 2022 00:12:00 GMT
    [cf-cache-status] => DYNAMIC
    [expect-ct] => max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
    [report-to] => {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=LPZRyliWp1v0flq8W%2Blkx3YM7AHvkaZj9C%2Bvc4E7BapRlvhfqt1DZGItAeZvDbB6KkeOfxLypWJvscrqEw8tf5MJCHGRXpyt7rgXjGVVFTeApShApB5Yu5JWDYmO3vSi"}],"group":"cf-nel","max_age":604800}
    [nel] => {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
    [server] => cloudflare
    [cf-ray] => 7211417c8eb378ac-VIE
    [content-encoding] => gzip
    [alt-svc] => h3=":443"; ma=86400, h3-29=":443"; ma=86400
)
Array
(
    [url] => https://cool5site.biz/
    [content_type] => text/html
    [http_code] => 403
    [header_size] => 780
    [request_size] => 212
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.088935
    [namelookup_time] => 3.6E-5
    [connect_time] => 0.009218
    [pretransfer_time] => 0.037872
    [size_upload] => 0
    [size_download] => 620
    [speed_download] => 7045
    [speed_upload] => 0
    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0.088468
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 104.21.94.130
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 48216
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head>
    <title>403 &mdash; Forbidden</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <meta name="description" content="You do not have permission to view this"/>
    <style type="text/css">
        body {font-size:14px; color:#777777; font-family:arial; text-align:center;}
        h1 {font-size:180px; color:#99A7AF; margin: 70px 0 0 0;}
        h2 {color: #DE6C5D; font-family: arial; font-size: 20px; font-weight: bold; letter-spacing: -1px; margin: -3px 0 39px;}
        p {width:320px; text-align:center; margin-left:auto;margin-right:auto; margin-top: 30px }
        div {width:320px; text-align:center; margin-left:auto;margin-right:auto;}
        a:link {color: #34536A;}
        a:visited {color: #34536A;}
        a:active {color: #34536A;}
        a:hover {color: #34536A;}
    </style>
</head>

<body>
    <p><a href="https://cool5site.biz/">cool5site.biz</a></p>

    <h1>403</h1>
    <h2>Forbidden</h2>
    <div>
        Unfortunately, you do not have permission to view this
    </div>
</body>

</html>

Fatal error: Uncaught Embed\Exceptions\InvalidUrlException: Invalid url 'https://cool5site.biz/' (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