Hi Edub,
Unfortunately Ubuntu is not supported. The installation scripts and the applications were not created with Ubuntu in mind.
Bash and csh scripts are not 100% compatible with Dash and WILL cause issues during install.
Even if you were to get through the installation you would likely encounter many issues with running the applications.
Please install a supported OS such as Centos7.6.
Unfortunately there isn't much else we can suggested.
Thank you,
Jake