Symptoms
- When trying to install a Let’s Encrypt or Digicert certificate in Plesk, the following error appears:
click here to see the error message
PLESK_ERROR: external error ;-P
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<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>
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<p>If you think this is an error, please <a href=” https://www.plesk.com/bug-report/ ” target=”_blank”>let us know</a> so we can fix it!</p>
<p>That’s what you can do</p>
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