Initial user creation in automated installer script fails on Ubuntu 20.04

[til-jmac]

The automated installer fails to create the initial admin user when trying to install using AWS cloudformation on Ubuntu 20.04.

Line 624 in the automated installer file is this:

I believe the cause is related to this:
https://unix.stackexchange.com/questions/503111/group-permissions-for-root-not-working-in-tmp

[hafizmujadidKhalid]

@til-jmac ! did you find some workaround?