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Issue Lets Encrypt - Plesk - Internal error ;-P

MisterM

New Pleskian
Hi

CentOS 6.9 (Final)‬
Product Plesk Onyx 17.5.3
Let's Encrypt v 2.3.0-190

I have 2 identical Fasthost servers. 1 server is fine and runs Lets Encrypt without a problem. I have just upgraded the new 2nd server to Onyx 17.5.3 (the same version on server 1) but cannot apply Lets Encrypt certificates to any of my domains with only the below source code shown as an error message below (highlighted in red within Plesk).

The domains have had plenty of time to propagate to the new server, so I doubt it is a dns issue.

Any ideas?

Many thanks

D



Internal error ;-P
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>502 Bad Gateway</title>
<link rel="stylesheet" href="/error_docs/styles.css">
</head>
<body>
<div class="page">
<div class="main">
<div class="error-description">
<h1>Server Error</h1>
<div class="error-code">502</div>
<h2>Bad Gateway</h2>
<p class="lead">Web server received an invalid response while acting as a gateway or proxy server.</p>
<hr/>
<p>If you think this is an error, please <a href="Contact Plesk Support" target="_blank">let us know</a> so we can fix it!</p>
<p>That's what you can do</p>
<div class="help-actions">
<a href="javascript:location.reload();">Reload Page</a>
<a href="javascript:history.back();">Back to Previous Page</a>
<a href="/">Home Page</a>
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<a href="Contact Plesk Support" class="help-link" title="Report a problem" target="_blank">
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