

This looks suspiciously similar to what LTeX produces for me. Are you sure that this is not the true origin of the error? If this is indeed LTeX, you will see it in :LspInfo
.
If so, here is some info about changing the language of LTeX: https://valentjn.github.io/ltex/advanced-usage.html In short, you could try \usepackage[french]{babel}
, or LTeX: language=fr-FR
.
It seems OP wanted to pass the file name to
-k
, but this parameter takes the password itself and not a filename:-k password The password to derive the key from. This is for compatibility with previous versions of OpenSSL. Superseded by the -pass argument.
So, as I understand, the password would be not the first line of
/etc/ssl/private/etcBackup.key
, but the string/etc/ssl/private/etcBackup.key
itself. It seems that-kfile /etc/ssl/private/etcBackup.key
or-pass file:/etc/ssl/private/etcBackup.key
is what OP wanted to use.