did you check in the REPL
] status Atom
Status `~/.julia/environments/v1.3/Project.toml`
[c52e3926] Atom v0.12.9
[e5e0dc1b] Juno v0.7.2
[37b6cedf] Traceur v0.3.0
[0f1e0344] WebIO v0.8.11
if Atom < v0.12 do
pkg> up
in Atom do Atom > Preferences > Packages > julia-client > update
, julia-client should be at 0.12.3
see also [ANN] Juno 0.12