After I configure the shadowsocks server in the google cloud, the client cannot connect

[hyzchina]

What version of shadowsocks-libev are you using?

shadowsocks-libev 3.2.5

What operating system are you using?

Debian 10

What did you do?

vpn

What did you expect to see?

how can I connect to the server

What did you see instead?

unable to resolve host"cp.cloudflare.com":no address associated....

What is your config in detail (with all sensitive info masked)?

{
"server":["::1", "xx.xx.xx.xx"],
"mode":"tcp_and_udp",
"server_port":xx,
"local_port":1080,
"password":"xxxxxxxx",
"timeout":60,
"method":"chacha20-ietf-poly1305"
}