Failure to start Kernel due to Modules not installed

Python kernels can fail to start if some modules such as ptyprocess, ipykernel, pyzmq, etc are not installed.

Recommended solution(s)

• Please consider installing the missing modules.
• If they have already been installed, its possible it hasn't been installed correct, hence try the reinstall option as follows:
  • python -m pip install <xyz> -U --force-reinstall
  • conda install --name <environment name> <xyz> --update-deps --force-reinstall (if using Conda environments)
• It is possible the Python environment is corrupted. This could happen when mixing pip install with conda environments. You might want to consider using another Python environment (such as a new conda environment).
• It is possible you are using the wrong Python environment. Please review the Python environment selected in the kernel picker (generally displayed on the top right hand corner of the notebook).