Plotly - network error at opening a window from REPL, Jupyter is fine


I am a new in plotlyjs. Works in Jupyter notebook, but not from REPL. From REPL it is opening a standalone window, wait for a while, and then showing:
**Network Error (tcp_error) **
A communication error occurred: “Operation timed out”

I am using proxy under firewall, but everything else works fine and Jupyter works fine. What should I do?