Turtle bgpic not working online

[vlad23tudor]

Hello,
Please help us a little.
bgpic is not working with some url like:

import turtle
s = turtle.Screen()
t = turtle.Turtle()
s.bgpic("https://mars.pythonisti.ro/background_mars_1.jpg")
t.fd(100)

You can check the project here:
https://mars.pythonisti.ro/

Where is the bug in the code, please?
Thank you!