here luthy l2.ini to 127.0.0.1 the one i use. but i think the not Original system folder is some new type of security. without mod it you cant login and if you mod it you can login but some effects won't work and npcs don't show up at all
system.txt
here luthy i changed it.
like i said i compiled the server and datapack
and got the server running no errors or anything but not all the npcs and monsters spawns ( i have no idea )
build.xml
build.xml