Su sistema no puede acceder al almacén de snap

Traté de actualizar mi Windows ubuntu subsistema a 18.10 utilizando esta instrucción: https://linuxconfig.org/how-to-upgrade-ubuntu-to-18-10-cosmic-cuttlefish#h9-how-to-upgrade-ubuntu-the-debian-way

Pero dentro de la actualización me aparece este error:

 Your system is unable to reach the snap store, please make sure you're connected to the Internet and update any   
  firewall or proxy settings as needed so that you can reach the snap store.                                        

  You can manually check for connectivity by running "snap info lxd"                                                

  Aborting will cause the upgrade to fail and will require it to be re-attempted once snapd is functional on the    
  system.                                                                                                           

  Unable to reach the snap store

Mi cortafuegos está desactivado para no veo ninguna razón, por qué esto no funcionaría.

También he intentado ejecutar snap info lxd pero

Interacting with snapd is not yet supported on Windows Subsystem for Linux.
This command has been left available for documentation purposes only.

Aquí está el mensaje completo en la línea de comandos, al intentar ejecutar la actualización:

The following additional packages will be installed:
  lxd
The following packages will be upgraded:
  lxd
1 upgraded, 0 newly installed, 0 to remove and 227 not upgraded.
180 not fully installed or removed.
Need to get 0 B/11.1 kB of archives.
After this operation, 20.5 MB disk space will be freed.
Do you want to continue? [Y/n] y
Preconfiguring packages ...
(Reading database ... 61051 files and directories currently installed.)
Preparing to unpack .../archives/lxd_1%3a0.4_all.deb ...
invoke-rc.d: could not determine current runlevel
Stopping Container hypervisor based on LXC: (not running).
=> Installing the LXD snap
==> Checking connectivity with the snap store
===> Unable to contact the store
===> Aborting at user request
dpkg: error processing archive /var/cache/apt/archives/lxd_1%3a0.4_all.deb (--unpack):
 new lxd package pre-installation script subprocess returned error exit status 1
invoke-rc.d: could not determine current runlevel
Errors were encountered while processing:
 /var/cache/apt/archives/lxd_1%3a0.4_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

¿Alguna idea de cómo puedo solucionarlo? El subsistema tiene conexión a Internet, así que no estoy seguro, ¿por qué no puede conectarse a la tienda de snap