Thank you to both responders.
I am using LibreOffice Vanilla by Collabora Productivity. The LibreOffice version is 6.2.6.2. I bought the product from Collabora Productivity through Apple Apps Store to specifically use BASE. I did this in order NOT to have to download extraneous files such as JDK, like I used to have to do when I was running Linux Mint on a different machine.
The error “The connection to the external data source could not be established. No SDBC driver was found for the URL 'sdbc:embedded:firebird.” occurs anytime I click the icons in the left panel of BASE and try to create something related to the icon. The icons are Tables, Query, Forms, and Reports. It happens in both the Design mode and Wizard mode.
I really didn’t want to load another file but if I have to then can you please tell me where to get JDK or any other file you recommend?
Thank you.