Thanks @Divya_Bhadauria . For me the issue is with the extension of the notebook and it is solved now.

I gave the source as Repos, type as python script. In repos all python files are shows with ".py" extension. So I thought it refers the correct path. But when I cloned the Repos to my workspace it referred the file as Notebook and the extension ".py" was not available. This is what the issue from my end. So, I modified the name with .py and then it shows the script as file instead of notebook. This solves the issue.