Arch Linux

Description:
When I run spyder in terminal, it can't start and show error:
Traceback (most recent call last):
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 568, in _build_master
ws.require(__requires__)
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 886, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 777, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (pyflakes 2.3.1 (/usr/lib/python3.9/site-packages), Requirement.parse('pyflakes<2.3.0,>=2.2.0'), {'python-language-server'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/bin/spyder", line 33, in <module>
sys.exit(load_entry_point('spyder==5.0.0', 'gui_scripts', 'spyder')())
File "/usr/bin/spyder", 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/python3.9/site-packages/spyder/app/start.py", line 34, in <module>
from spyder.utils.external import lockfile
File "/usr/lib/python3.9/site-packages/spyder/utils/external/lockfile.py", line 31, in <module>
from spyder.utils.programs import is_spyder_process
File "/usr/lib/python3.9/site-packages/spyder/utils/programs.py", line 29, in <module>
import pkg_resources
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 3243, in <module>
def _initialize_master_working_set():
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 3226, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 3255, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 570, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 583, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python3.9/site-packages/pkg_resources/__init__.py", line 772, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pyflakes<2.3.0,>=2.2.0' distribution was not found and is required by python-language-server

Additional info:
* package version(s) : 5.0