When enable go modules feature, will fail to go get

[VictorZhucx]

OS: Ubuntu 18.04.1 LTS
GO VERSION: go1.11.12 linux/amd64

When I used "go get github.com/bettercap/gatt", it will throw error:
root:/home/root/code/tmp1/ipc#go get github.com/bettercap/gatt
go build github.com/mgutz/logxi/v1: no Go files in