Error while installing on Ubuntu 20.04.4 LTS

apt writes it’s own logfile to /var/log/apt/… maybe check there as well, if you can see something.

as an alternative you could go through the install script and remove the 'q’uiets from the apt command to actually see, what might be happening.

apart from that, you may also want to check this comment: Error: apt-get install failed HELP - #6 by Jo-Anne - which points out, that you might want or need to enable additional standard repos for ubuntu to have all packages available.

if the last point would solve your problem please also open a github issue, pointing out, which repo your install might be missing, and maybe we can add a check in the future for those…