Letsencrypt Auto renewal fails - Error getting validation data

[Joulinar]

@MichaIng

mkdir -p /var/www/.well-known/acme-challenge
echo 'this works' > /var/www/.well-known/acme-challenge/xclDxBCplrSQSNvv9klstrMm16SUjsf7ekMkTU6RldE
curl -IL 'http://mydomain.org/.well-known/acme-challenge/xclDxBCplrSQSNvv9klstrMm16SUjsf7ekMkTU6RldE'

This can be done at any time. It’s a manual test like letsencrypt would do. It should just verify if you are able to download the file yourself.