Running snap packages (snaps) is problematic on our default MX setup because of a couple of factors.

1. snapd (the snaps backend) requires systemd and we use sysVinit by default
2. snapd confinement doesn’t like the symlink we use to link /tmp to /var/tmp.

If you boot into systemd instead of the default sysVinit, you should be able to run snaps: when the GRUB screen is displayed on boot, click on Advanced options… and select to use systemd.