It looks like you have forgotten to check in the file lets-encrypt-x1-cross-signed.pem into files/ folder.
Also, there are 2 intermediate certificates for Letsencrypt, it's probably worth adding the second certificate as well now, even if it's meant to be used only in case of disaster.
Hello,
It looks like you have forgotten to check in the file lets-encrypt-x1-cross-signed.pem into files/ folder. Also, there are 2 intermediate certificates for Letsencrypt, it's probably worth adding the second certificate as well now, even if it's meant to be used only in case of disaster.
Ludovic