Can anyone let ,e know what to do ?After writing code, notebook is not showing the output, graphs etc

That is not a Jupyter issue that your screenshot is showing. It is simply not getting the download of the comma-separated data that the code is hinged on waiting to arrive. The cause could be a network issue or the link it uses is not accurate. Only you or someone knowledgeable with what you are doing and/or having access to where and what you are doing would be able to discern which. After restarting everything and trying again, if that doesn’t help, please contact your course organizers.