I tried to generate a certificate for a domain on my CentOS/Apache2/Plesk server using the following command:
./letsencrypt-auto certonly -a manual -d www.mydomain.de --server https://acme-v01.api.letsencrypt.org/directory --agree-dev-preview --rsa-key-size 4096
and was asked to have the web server display ‘the following content’ at http://www.mydomain.de/.well-known/acme-challenge/xxxx : yyyy . According to the instruction on how to generate this from command line, I take xxxx is a simple ascii text file containing nothing but the text string yyyy ?
Still, I received the error message
urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Error parsing key authorization file: Invalid key authorization: malformed key thumbprint … can anyone tell me the reason for this error? Can’t see what I might have done wrong.