Comment 3 for bug 1887096

For anyone having the same error that @taihsiangho mentions above, one possible cause may be from using LXC/LXD containers and not having an appropriate UID mapping for the snap_daemon user at the default high UID. See the following discourse thread for details:

https://discourse.maas.io/t/unable-to-install-maas-snap-on-lxd/3544