Hi @Debika_Chowdhury , which settings are you using? Are you running it locally with conda or with google colab or with binder? Which operating system do you have (windows, mac or linux)?
I am using PyCBC==1.18.0 and numpy==1.19.5. But you are right. My kernel got changed somehow, even though I was using igwn-py39 until the last tutorial. Thanks a lot, and sorry for the confusion.