Hello all I have created a new certificate for my internal Uyuni server using Let's encrypt. But I have some trouble to activate this certificate: # mgr-ssl-cert-setup --server-cert-file=/home/certs/uyuni.crt.pem --server-key-file=/home/certs/uyuni.key.pem Root CA is required I'm not the issue - there ars some certificates on https://letsencrypt.org/certificates/ With R3: # mgr-ssl-cert-setup --root-ca-file=/home/certs/lets-encrypt-r3.pem --server-cert-file=/home/certs/uyuni.crt.pem --server-key-file=/home/certs/uyuni.key.pem ERROR: Incomplete CA Chain. Unable to find issuer of 'C = US, O = Let's Encrypt, CN = R3' With fullchain.pem from Let's encrypt: # mgr-ssl-cert-setup --root-ca-file=/home/certs/fullchain.pem --server-cert-file=/home/certs/uyuni.crt.pem --server-key-file=/home/certs/uyuni.key.pem ERROR: Incomplete CA Chain. Unable to find issuer of 'C = US, O = Internet Security Research Group, CN = ISRG Root X1'' Some ideas? The certificate is valid - I can use it as apache certificate for the uyuni website and the browser says it is ok :) Best regards Martin