Can't update `fwupd`

PS /home/rokejulianlockhart> sudo snap refresh fwupd                                                                                                                                                        
[sudo] password for root: 
error: cannot perform the following tasks:
- Mount snap "fwupd" (5059) (installation not allowed by "shutdown" plug rule of interface "shutdown" for "fwupd" snap)
NativeCommandExitException: Program "sudo" ended with non-zero exit code: 1.
PS /home/rokejulianlockhart>
PS /home/rokejulianlockhart> snap info fwupd        
name:      fwupd
summary:   Firmware updates for Linux
publisher: Richard Hughes
store-url: https://snapcraft.io/fwupd
contact:   https://github.com/fwupd/fwupd
license:   unset
description: |
  The full fwupd firmware updating stack for Linux.  Can be used to perform updates on all supported
  devices via https://fwupd.org
commands:
  - fwupd.dbxtool
  - fwupd.fwupdmgr
  - fwupd.fwupdtool
services:
  fwupd: dbus, enabled, inactive
snap-id:      HpOj37PuyuaMUZY0NQhtwnp7oS5P8u5R
tracking:     latest/edge
refresh-date: yesterday at 14:15 BST
channels:
  latest/stable:    1.9.3               2023-07-12 (5039) 24MB -
  latest/candidate: 1.9.3               2023-07-11 (5039) 24MB -
  latest/beta:      ↑                                          
  latest/edge:      1.9.3-36-g996507d63 2023-07-18 (5059) 24MB -
installed:          1.9.3-35-g64c41336c            (5058) 24MB -
PS /home/rokejulianlockhart>