20.04 can't install"vanilla-gnome-desktop" & "vanilla-gnome-default-settings"

[Reece]

On 20.04 beta when I use:

"sudo apt install vanilla-gnome-desktop" I get this error in terminal at the end of the "install":

Errors were encountered while processing:
 vanilla-gnome-default-settings
 vanilla-gnome-desktop
E: Sub-process /usr/bin/dpkg returned an error code (1)

[Reece (kupoinyourwindow)]

After trying to "sudo apt update" I get this report in terminal,
it seems I get this after every apt command:

Setting up vanilla-gnome-default-settings (18.10.1) ...
update-alternatives: error: no alternatives for gdm3.css
dpkg: error processing package vanilla-gnome-default-settings (--configure)
:
 installed vanilla-gnome-default-settings package post-installation script
subprocess returned error exit status 2
dpkg: dependency problems prevent configuration of vanilla-gnome-desktop:
 vanilla-gnome-desktop depends on vanilla-gnome-default-settings; however:
  Package vanilla-gnome-default-settings is not configured yet.

dpkg: error processing package vanilla-gnome-desktop (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup
 error from a previous failure.
                               Errors were encountered while processing:
 vanilla-gnome-default-settings
 vanilla-gnome-desktop

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.