For references after discussions here Support MariaDB JDBC url and MariaDB driver and more from the Platform calls Have managed to make the demonstration to work…(this mode comes with pre-installed Demo Database)
All along Was thinking it was core issue 
yet it just needed a keen follow-up in the flow of pom steps (modules)
here are the screenshots of the working demonstration tested on linux and mac
Screenshots from Linux Ubuntu 20.4.6
Screenshots from Mac OS m2 silicon
For the next steps Am working on → Making The ciel and expert modes to work as also expected