Open Stack

Hi,

I installed Horizon on my Openstack Ussuri cloud and it has worked fine for some months. A few days ago, I had some trouble with python packages (I updated some dependencies by error). I'm trying to reinstall Horizon because it fails but it seems almost impposible to me:
# apt install openstack-dashboard
Configuring openstack-dashboard (3:18.3.2-0ubuntu0.20.04.2) ...
Collecting and compressing static assets...
WARNING:root:"dashboards" and "default_dashboard" in (local_)settings is DEPRECATED now and may be unsupported in some future release. The preferred way to specify the order of dashboards and the default dashboard is the pluggable dashboard mechanism (in /usr/share/openstack-dashboard/openstack_dashboard/enabled, /usr/share/openstack-dashboard/openstack_dashboard/local/enabled).
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 204, in fetch_command
app_name = commands[subcommand]
KeyError: 'collectstatic'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "manage.py", line 25, in <module>
execute_from_command_line(sys.argv)
File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
utility.execute()
File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 211, in fetch_command
settings.INSTALLED_APPS
File "/usr/lib/python3/dist-packages/django/conf/__init__.py", line 79, in __getattr__
self._setup(name)
File "/usr/lib/python3/dist-packages/django/conf/__init__.py", line 66, in _setup
self._wrapped = Settings(settings_module)
File "/usr/lib/python3/dist-packages/django/conf/__init__.py", line 157, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/usr/share/openstack-dashboard/openstack_dashboard/settings.py", line 352, in <module>
STATICFILES_DIRS += settings_utils.get_xstatic_dirs(
File "/usr/share/openstack-dashboard/openstack_dashboard/utils/settings.py", line 288, in get_xstatic_dirs
module = import_module(module_name)
File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'horizon.xstatic'
dpkg: error to process package openstack-dashboard (--configure)
E: Sub-process /usr/bin/dpkg returned an error code (1)

Thanks in advance,
Best

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