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Result:

https://1221c.weebly.com/a
Array
(
    [date] => Fri, 29 Sep 2023 19:51:10 GMT
    [server] => Apache
    [vary] => X-W-SSL,User-Agent
    [set-cookie] => language=en; expires=Fri, 13-Oct-2023 19:51:10 GMT; Max-Age=1209600; path=/
    [cache-control] => private
    [x-host] => grn79.sf2p.intern.weebly.net
    [x-ua-compatible] => IE=edge,chrome=1
    [content-length] => 3909
    [content-type] => text/html; charset=UTF-8
)

Array
(
    [url] => https://1221c.weebly.com/a
    [content_type] => text/html; charset=UTF-8
    [http_code] => 404
    [header_size] => 353
    [request_size] => 119
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.677412
    [namelookup_time] => 0.012436
    [connect_time] => 0.159023
    [pretransfer_time] => 0.494687
    [size_upload] => 0
    [size_download] => 3909
    [speed_download] => 5774
    [speed_upload] => 0
    [download_content_length] => 3909
    [upload_content_length] => -1
    [starttransfer_time] => 0.677034
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 199.34.228.53
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 40252
    [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">
<head><script src="/gdpr/gdprscript.js?buildTime=1696004323"></script>
	<title>404 - Page Not Found</title>
	<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<meta name="robots" content="noarchive" />
	<link rel="shortcut icon" href="//cdn1.editmysite.com/developer/none.ico" />

	<style type="text/css">
		@font-face {
			font-family: 'Proxima Nova';
			font-weight: 300;
			src: url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-light/31AC96_0_0.eot");
			src: url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-light/31AC96_0_0.eot?#iefix") format("embedded-opentype"), url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-light/31AC96_0_0.woff") format("woff"), url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-light/31AC96_0_0.ttf") format("truetype");
		}

		@font-face {
			font-family: 'Proxima Nova';
			src: url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-regular/31AC96_1_0.eot");
			src: url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-regular/31AC96_1_0eot?#iefix") format("embedded-opentype"), url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-regular/31AC96_1_0.woff") format("woff"), url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-regular/31AC96_1_0.ttf") format("truetype");
		}

		@font-face {
			font-family: 'Proxima Nova';
			font-weight: 500;
			src: url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-semibold/31AC96_2_0.eot");
			src: url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-semibold/31AC96_2_0.eot?#iefix") format("embedded-opentype"), url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-semibold/31AC96_2_0.woff") format("woff"), url("//cdn2.editmysite.com/components/ui-framework/fonts/proxima-nova-semibold/31AC96_2_0.ttf") format("truetype");
		}

		body {
			background-color: #F8F8F8;
			font-family: 'Proxima Nova';
		}

		hr {
			border: 1px solid #E7E7E7;
			border-top: 0;
		}

		.warning-container {
			padding: 29px 40px;
			padding-bottom: 0;
			box-sizing: border-box;
			text-align: center;
			background-color: white;
			border: 1px solid #D4D4D4;
			height: 335px;
			width: 484px;
			margin: 0 auto;
			margin-top: 10%;
			-webkit-box-shadow: 0px 0px 41px -8px rgba(237,234,237,1);
			-moz-box-shadow: 0px 0px 41px -8px rgba(237,234,237,1);
			box-shadow: 0px 0px 41px -8px rgba(237,234,237,1);
		}

		.header {
			margin: 26px 0 0 0;
			color: #363B3E;
			font-size: 45px;
			font-weight: 500;
		}

		.error {
			margin: 0 0 0 0;
			color: #9BA0A3;
			margin-bottom: 35px;
		}

		.check-url, .otherwise {
			color: #666C70;
		}

		.check-url {
			margin-top: 0;
			font-weight: 500;
		}

		.otherwise {
			margin-top: 0;
		}

		.logo {
			width: 82px;
		}

		.bottom-content {
			display: inline-block;
			height: 120px;
			line-height: 120px;
		}

		.bottom-content > span {
			display: inline-block;
			vertical-align: middle;
			line-height: normal;
		}

		a {
			color: #2990EA;
			text-decoration: inherit;
		}

		@media (max-width: 550px) {
			.warning-container {
				width: 80%;
			}
		}

	</style>
</head>
<body>
	<div class="warning-container">
		<a href="/">
			<img class="logo" src="//cdn1.editmysite.com/images/weebly-logo-blue.png">
		</a>
		<h2 class="header">404</h2>
		<p class="error">Error - Page Not Found</p>
		<hr>
		<div class="bottom-content">
			<span>
				<p class="check-url">Please check the URL.</p>
				<p class="otherwise">Otherwise, <a href="/">click here</a> to be redirected to the homepage.</p>
			</span>
		</div>
	</div>
</body>
</html>

Fatal error: Uncaught Embed\Exceptions\InvalidUrlException: Invalid url 'https://1221c.weebly.com/a' (Status code 404) 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