There is an error in Pkg.build(“Plots”). I solved this according to the suggestion from @mkborregaard by downloading https://cdn.plot.ly/plotly-latest.min.js2 on my web browser.
But when I run plot(), Julia crashed with the following message. When I installed GR.jl and change the background to gr, the error does not exist. Thus, this crash error only for PyPlot background.
(Plots.jl, Julia0.61 Windows 7, 64 Bit, Plots.jl v0.13.1)
However, the same code run correctly in Jupyter.