julia> using Pkg
julia> Pkg.add(“PyPlot”)
Updating registry at C:\Users\Administrator\.juliapro\JuliaPro_v1.4.2-1\registries\JuliaPro
Cannot reach authentication server at https://pkg.juliacomputing.com/auth or authentication failed.
Please check your internet connection and firewall settings.
Alternatively, open
in a browser, authenticate, and save the downloaded file at
C:\Users\Administrator.juliapro\JuliaPro_v1.4.2-1\servers\pkg.juliacomputing.com\auth.toml
Press Enter when you’re done…