Failed to create secure directory

When I run update-manager, I get "Failed to create secure directory" in the output:

```
$ update-manager -d
Checking for a new Ubuntu release
Checking for a new Ubuntu release
authenticate 'hirsute.tar.gz' against 'hirsute.tar.gz.gpg'
extracting 'hirsute.tar.gz'
Failed to create secure directory (/root/.config/pulse): Permission denied
Failed to create secure directory (/root/.config/pulse): Permission denied
Failed to create secure directory (/root/.config/pulse): Permission denied
Failed to create secure directory (/root/.config/pulse): Permission denied

```

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubuntu-release-upgrader-core 1:20.10.15
ProcVersionSignature: Ubuntu 5.8.0-53.60-generic 5.8.18
Uname: Linux 5.8.0-53-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu50.7
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed May 26 11:15:38 2021
InstallationDate: Installed on 2020-11-13 (194 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to groovy on 2021-05-26 (0 days ago)
VarLogDistupgradeTermlog: