Note: this is a bad release with path issues. Posting to leave the issue up.
You will need kernels to be installed directly to run nteract:
python3 -m pip install ipykernel
python3 -m ipykernel install --user
Additionally, you may need ZMQ installed. You can install with brew if on a Mac:
brew install zmq czmq
If it seems nteract is not behaving correctly, you can try to investigate by selecting the View menu, then Toggle Developer Tools.