We're running self hosted on centos7 and trying to upgrade from version 9 to 13. Yes, we missed the intermediate versions. (I didn't see intermediate versions available on the billing page. Are they available somewhere/) Anyway, upgrade to 13 isn't going well and it would be useful to have error logs? I don't see machforms logging to the apache logs. I don't see any place to configure logs (location or log level) in config.php. I tried creating a log subdirectory in the machforms directory, made it writable 777, but nothing shows up there. I tried search this site for info about error logging, but haven't found anything yet.