bug: vorta 0.8.7-1~bpo11+1 - error on startup: The 'secretstorage' distribution was not found and is required by vorta

[Axel Wikström <axel.wikstrom@gmail.com>]

Installing vorta from buster-backports on a fresh Debian 11 install
with XFCE, and trying to start it from the command line yields this:

Traceback (most recent call last):
  File "/usr/bin/vorta", line 33, in <module>
    sys.exit(load_entry_point('vorta==0.8.7', 'gui_scripts', 'vorta')())
  File "/usr/bin/vorta", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/usr/lib/python3.9/importlib/metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/usr/lib/python3/dist-packages/vorta/__main__.py", line 10, in <module>
    from vorta.store.connection import init_db
  File "/usr/lib/python3/dist-packages/vorta/store/connection.py",
line 9, in <module>
    from .migrations import run_migrations
  File "/usr/lib/python3/dist-packages/vorta/store/migrations.py",
line 6, in <module>
    from .models import (DB, ArchiveModel, BackupProfileModel, EventLogModel,
  File "/usr/lib/python3/dist-packages/vorta/store/models.py", line
13, in <module>
    from vorta.utils import slugify
  File "/usr/lib/python3/dist-packages/vorta/utils.py", line 23, in <module>
    from vorta.borg._compatibility import BorgCompatibility
  File "/usr/lib/python3/dist-packages/vorta/borg/_compatibility.py",
line 1, in <module>
    from pkg_resources import parse_version
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py",
line 3243, in <module>
    def _initialize_master_working_set():
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py",
line 3226, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py",
line 3255, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py",
line 568, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py",
line 886, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py",
line 772, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'secretstorage' distribution
was not found and is required by vorta

Axel