I ran into this issue today as well. Performing the following can recreate the issue on Ubuntu 18.04.3 LTS:
$ sudo apt remove maas $ sudo apt remove autoremove $ sudo apt install maas
This was fixed by the previous suggestion:
$ sudo apt autoremove --purge maas $ sudo apt install maas
I ran into this issue today as well. Performing the following can recreate the issue on Ubuntu 18.04.3 LTS:
$ sudo apt remove maas
$ sudo apt remove autoremove
$ sudo apt install maas
This was fixed by the previous suggestion:
$ sudo apt autoremove --purge maas
$ sudo apt install maas