I have a small web server and user webalizer. I recently converted to all https. You say you "added" the ssl access log. That makes me think you have two log files defined in your webalizer.conf file. From what I understand, webalizer only supports one log file. (Someone will correct me if I'm wrong.) I changed my webalizer.conf file to use only the ssl access log and it reads that with no problem. I don;t really care about the original access log. Since I am all https now all it has are the initial http hits logged with status code 301 for the redirect to the https side. I guess you'd somehow have to combine the two log files, either by changing the logging configuration to log everything to a single log file or by running a process that would merge the two log files and feed that to webalizer.
Charlie Dennett