snap fails to update the gimp snap

[Laurent Bonnaud]

Hi,

here is the problem:

# snap refresh
error: cannot perform the following tasks:
- Setup snap "gimp" (281) security profiles (cannot update mount namespace of snap "gimp": cannot update preserved namespace of snap "gimp": cannot update snap namespace: no such file or directory)

Here is the state of this snap on my system:

$ snap info gimp
name: gimp
[...]
channels:
  latest/stable: 2.10.20 2020-06-21 (281) 184MB -
  latest/candidate: 2.10.20 2020-06-11 (281) 184MB -
  latest/beta: ↑
  latest/edge: 2.10.20 2020-06-21 (286) 244MB -
installed: 2.10.18 (273) 184MB -

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: snapd 2.45.1+20.04
Uname: Linux 5.7.5-050705-lowlatency x86_64
ApportVersion: 2.20.11-0ubuntu27.3
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Wed Jun 24 12:43:43 2020
SourcePackage: snapd
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.sudoers.d.99-snapd.conf: [inaccessible: [Errno 13] Permission denied: '/etc/sudoers.d/99-snapd.conf']