I am getting the following error when trying to secure Plesk Onyx 17.5.3 Update #6:
Let's Encrypt nameserver certificate creation failure
Code:
Error: Execution letsencrypt-hostname.sh has failed with exit code 1, stdout: , stderr: [2017-05-28 21:55:23] ERR [extension/letsencrypt] Execution of /usr/local/psa/admin/plib/modules/letsencrypt/scripts/cli.php failed with exit code 1 and the output: Challenge marked as invalid. Details: Could not connect to ns1.mydomain.com Execution of /usr/local/psa/admin/plib/modules/letsencrypt/scripts/cli.php...