I just wanted to say I’m having the same issue when trying to upgrade fastai on AWS EC2. There is an existing installation of 1.0.61 which I was trying hard to remove (turns out i had to do both pip uninstall and conda uninstall).
Pip install did make fastai 2.4.1 to appear in conda list but the notebook running on this kernel did not see fastai as a package. When trying to install using the github instructions with conda, it keeps trying to install 1.0.61.
Pulling and installing from github results in ModuleNotFoundError in the notebook.
It’s quite a mystery.