poetry error

(test-proj-WTfosmZH-py3.8) [user1@my-machine01 ~/test-proj]$ poetry show -vvv
Using virtualenv: /home/user1/.cache/pypoetry/virtualenvs/test-proj-WTfosmZH-py3.8

  Stack trace:

  6  ~/.poetry/lib/poetry/_vendor/py3.8/clikit/console_application.py:131 in run
Traceback (most recent call last):
  File "/home/user1/.poetry/lib/poetry/puzzle/solver.py", line 233, in _solve
    result = resolve_version(
  File "/home/user1/.poetry/lib/poetry/mixology/__init__.py", line 7, in resolve_version
    return solver.solve()
  File "/home/user1/.poetry/lib/poetry/mixology/version_solver.py", line 83, in solve
    self._propagate(next)
  File "/home/user1/.poetry/lib/poetry/mixology/version_solver.py", line 123, in _propagate
    root_cause = self._resolve_conflict(incompatibility)
  File "/home/user1/.poetry/lib/poetry/mixology/version_solver.py", line 321, in _resolve_conflict
    raise SolveFailure(incompatibility)
poetry.mixology.failure.SolveFailure: Because test-proj depends on pytest (^5.2) which doesn't match any versions, version solving failed.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/console_application.py", line 131, in run
    status_code = command.handle(parsed_args, io)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/api/command/command.py", line 120, in handle
    status_code = self._do_handle(args, io)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/api/command/command.py", line 171, in _do_handle
    return getattr(handler, handler_method)(args, io, self)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/cleo/commands/command.py", line 92, in wrap_handle
    return self.handle()
  File "/home/user1/.poetry/lib/poetry/console/commands/show.py", line 82, in handle
    ops = solver.solve()
  File "/home/user1/.poetry/lib/poetry/puzzle/solver.py", line 65, in solve
    packages, depths = self._solve(use_latest=use_latest)
  File "/home/user1/.poetry/lib/poetry/puzzle/solver.py", line 241, in _solve
    raise SolverProblemError(e)
poetry.puzzle.exceptions.SolverProblemError: Because test-proj depends on pytest (^5.2) which doesn't match any versions, version solving failed.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/user1/.poetry/bin/poetry", line 17, in <module>
    main()
  File "/home/user1/.poetry/lib/poetry/console/__init__.py", line 5, in main
    return Application().run()
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/console_application.py", line 142, in run
    trace.render(io, simple=isinstance(e, CliKitException))
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/ui/components/exception_trace.py", line 232, in render
    return self._render_exception(io, self._exception)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/ui/components/exception_trace.py", line 257, in _render_exception
    self._render_trace(io, inspector.frames)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/ui/components/exception_trace.py", line 381, in _render_trace
    self._render_line(
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/ui/components/exception_trace.py", line 402, in _render_line
    io.write_line("{}{}".format(indent * " ", line))
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/cleo/io/io_mixin.py", line 65, in write_line
    super(IOMixin, self).write_line(string, flags)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/api/io/io.py", line 66, in write_line
    self._output.write_line(string, flags=flags)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/api/io/output.py", line 69, in write_line
    self.write(string, flags=flags, new_line=True)
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/api/io/output.py", line 61, in write
    self._stream.write(to_str(formatted))
  File "/home/user1/.poetry/lib/poetry/_vendor/py3.8/clikit/io/output_stream/stream_output_stream.py", line 24, in write
    self._stream.write(string)
UnicodeEncodeError: 'latin-1' codec can't encode character '\u2502' in position 27: ordinal not in range(256)