NWChem Ubuntu packages have a few bugs that were later fixed.
Please use the latest NWChem packages available from the github page, instead
https://github.com/nwchemgit/nwchem/releases/tag/v7.0.0-release
Here are the installation instructions
Installation instructions for the precompiled packages on Ubuntu Bionic
sudo apt -y install curl python3-dev gfortran mpi-default-bin mpi-default-dev libopenblas-dev ssh
curl -LJO https://github.com/nwchemgit/nwchem/releases/download/v7.0.0-release/nwchem-data_7.0.0-3_all.ubuntu_bionic.deb
curl -LJO https://github.com/nwchemgit/nwchem/releases/download/v7.0.0-release/nwchem_7.0.0-3_amd64.ubuntu_bionic.deb
sudo dpkg -i nwchem_7.0.0-3*.bionic.deb
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