Cannot install juno on ubuntu

It reported the following error when I try to install juno from atom on ubuntu.

Juno: Error installing package julia-client
Please check your internet connection, or report this to https://github.com/JunoLab/Juno.jl/issues or https://discourse.julialang.org/ and we'll try to help.

Error: Installing “julia-client@0.12.6” failed.