Could not connect to a default or fallback server, please try again later: io.netty.channel.Abstract

I'm using mcworld.cc hosting.
I made bungeecord server and lobby server(airplane api).
when I connect to the server, error comes: Could not connect to a default or fallback server, please try again later: io.netty.channel.AbstractChannel$AnnotatedConnectException
someone help me.

bungee config: https://pastebin.com/UhKXbymY
lobby server.properties: https://pastebin.com/Dq3u0Qkc
lobby spigot.yml: https://pastebin.com/QdRbpDWt
pls reply on:...

Could not connect to a default or fallback server, please try again later: io.netty.channel.Abstract