Modification of server.cfg has been disabled in the file browser as it
creates inconsistancies with the settings in Cortex.  You can
however import the config file via the edit config page.  In the
Config Mode section of the page select “Import Config” and paste the
contents of your server.cfg file into the textarea field provided. Hit
save and your server.cfg file will be saved into Cortex. You have to go
through this because certain fields such as ip address, port, and max
players are config options that are protected by Cortex.