How to Download world but in console (no in game)

[SomeMadLad]

need help downloading my world from the console because something blew up in my world after using a command

and i now cant get into the server. it kicks me out after a minute of intense lagging and gives me the error :

connection lost

could not connect to a default or fall back server, please try again later:

io.netty.channel.AbstractChannel$AnnotatedConnectException

i hope you guys can help

[Frostingly]

You should've did a backup first, if you did a backup then you can easily retrieve it and upload it to your server and be fine. You cannot do anything, you gotta redo everything.