- Plesk for Windows
Let's Encrypt certificate could not be issued or renewed with the following error message:
Detail: Invalid response from http://example.com/.well-known/acme-challenge/MANdx2vNFLjJ5yy7cNaV88NiQzddIDU7Gj3bpwTCllA [203.0.113.2]: "<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">\r\n<html xmlns="http"
Accessing the challenge file URL from the error message results in "404 Not found" error.
SSL It! extension misconfiguration.
Connect to the server via RDP.
Run the following command in command prompt as Administrator to disable SSL It!:
plesk ext sslit --common-challenge-dir -disable
Run the following command to enable it back again:
plesk ext sslit --common-challenge-dir -enable
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