Juergen, I am sorry to have to follow up with what is likely a very silly question…
But I went back to CertBot and pressed return so it would continue - which it did, successfully. It has downloaded 3 files to my workstation:-
0000_cert.pem
0000_chain.pem
0001_chain.pem
I must be wrong, but I thought that a *.pem file was a “Privacy Enhanced Mail” file… as opposed to a *.cert, which would be a certificate. Is it safe to use these interchangeably?
Thank you.
Edit: I am wrong… I tried these files and they work perfectly. Juergen, thank you again for your very kind assistance…