Although I previously wrote that "I can't help further"; I was curious. Here's some suggestions which might get you a bit further.

• Just telling us "From google ..." is not particularly helpful. I'm guessing a search led you to a forum/blog/etc. which provided the commands you posted. More information about that may help us to help you.
• I would have started investigating from CPAN. Devel::IPerl is fairly sparse; following the link to the distribution, Devel-IPerl, provides a little more.
• In README.md, I see "ZeroMQ", "Jupyter", and "CPAN" sections; your post indicates that you worked on "ZeroMQ" and "CPAN", but not "Jupyter". Is that something you need to revisit?
• There's also a link to iperl. This has virtually no information. To be honest, that raises a red flag for me and doesn't fill me with confidence: is the code also incomplete?
• The Issues link shows five bugs. See if there's anything useful for you.
• The Repository link leads to a GitHub page. That appears to have more information than the CPAN page. See if there's anything useful here.
• That GitHub page has an Issues link. This shows 37 open items. Again, see if there's anything useful for you.
• The cpanm utility has a lot of options. Some of these may provide useful feedback: --verbose stands out in this regard.

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