@geraltofrivia, Thank you. I also have flatpak installed currently as ‘system’. I removed one installed as ‘user’. I assume it works for others too and that’s why they are not able to understand or assist with my problem.
I managed to screw up my install. I was t/s further and disabled SELinux. Rebooted system, GB launched OK from GUI and came upto Boxes logo but as mentioned in previous post, not able to create any boxes. I reverted back SELinux setting (enforcing) as it was before. Rebooted and my system won’t boot. 