Environment
- Qiskit Nature version: 0.7.2
- Python version: 3.8.0
- Operating system: Ubuntu 20.04
What is happening?
While I was trying to run "02_vibrational_structure.ipynb" tutorial, this tutorial is getting this following error while mapping to qubit hamiltonian:

How can we reproduce the issue?
- Install the dependencies for running Qiskit Nature and open the tutorial in a editor(e.g. in my case VS CODE).
- Run first three code cells sequentially.
What should happen?
Tutorial should be able to reach output state.
Any suggestions?
Please update the code or tutorial.