Testing a FTP app (MonstaFTP) that is installed on the ISPconfig Master server and it fails during LARGE zip and file uploads and the support staff for monsta are telling me to look in the php log to see what errors I'm getting. The app is giving me error 500, but not sure where to look at the log on the Master to figure out what those errors actually are. Thanks
That's the normal error.log of your web server. E.g. /var/log/apache2/error.log or /var/log/nginx/error.log.