IPyKernel and other dependencies are not installed

Running Python kernels requires some dependencies such as IPyKernel and the like to be installed. Without these packages the kernels will fail to start.

• Please ensure these packages are installed, using the following command:

  # if using conda, where `env name` is the name of the conda environment.
  conda install -c conda-forge -n <env name> ipykernel
  # if not using conda
  <fully qualified path to Python> -m pip install ipykernel

• If these packages have been installed, then try re-installing them using the following command:

  # if using conda, where `env name` is the name of the conda environment.
  conda install -c conda-forge -n <env name> ipykernel --update-deps --force-reinstall
  # if not using conda
  <fully qualified path to Python> -m pip install ipykernel -U --force-reinstall