I'm trying to import the email configuration with the tool from the web interface. I've configured a remote user in my old server, given him all the rights. I then go to the ISPConfig 3 mail function, put in the details, but when I click Connect to remote server, I just get an "Internal Server Error" message come back. I have valid certificates on the old and new ISPConfig servers. Old server running 3.1.15p2 and new server running 3.1.15p3. Are these errors logged somewhere to help debugging? I've enabled debug but nothing relevant appears in /var/log/ispconfig/ispconfig.log - maybe I'm looking in the wrong place?