execute build.sh indicate error

[leoxu8703]

this 172.217.160.113 not ping
[root@vmt30129 keyhole-master]# ./build.sh
go: github.com/simagix/gox@v0.2.1-0.20210204133338-1ac49535b8c0: missing go.sum entry; to add it:
go mod download github.com/simagix/gox
[root@vmt30129 keyhole-master]# go mod download github.com/simagix/gox
go: github.com/simagix/gox@v0.2.1-0.20210204133338-1ac49535b8c0: Get "https://proxy.golang.org/github.com/simagix/gox/@v/v0.2.1-0.20210204133338-1ac49535b8c0.mod": dial tcp 172.217.160.113:443: i/o timeout

[simagix]

Check your DNS connectivity. Can’t help with your environment issue.