Error: Can't mix bytes and non-bytes in path components.

[akenion]

@scottbisker encountered this when upgrading from v4.0.1 to v4.0.2

wordfence malware-scan --cache-directory /tmp --pre-compile-generic --pattern-database-path=/tmp/vectorscan-5.4.6-amd64-premium.1.db --match-engine vectorscan --license <any key> --no-check-for-update --accept-terms
Compiling 6021 pattern(s) to vectorscan database (this may take a substantial amount of time depending on system performance)...
Successfully compiled vectorscan database
Error: Can't mix bytes and non-bytes in path components.

Successfully compiled vectorscan database
Traceback (most recent call last):
  File ".local/bin/wordfence", line 8, in <module>
    sys.exit(main())
  File ".local/lib/python3.10/site-packages/wordfence/cli/cli.py", line 193, in main
    exit_code = invoke_cli()
  File ".local/lib/python3.10/site-packages/wordfence/cli/cli.py", line 187, in invoke_cli
    return exception_handler.process_exception(exception)
  File ".local/lib/python3.10/site-packages/wordfence/cli/cli.py", line 43, in process_exception
    raise exception
  File ".local/lib/python3.10/site-packages/wordfence/cli/cli.py", line 185, in invoke_cli
    return cli.invoke()
  File ".local/lib/python3.10/site-packages/wordfence/cli/cli.py", line 178, in invoke
    return subcommand.invoke()
  File ".local/lib/python3.10/site-packages/wordfence/cli/malwarescan/malwarescan.py", line 316, in invoke
    database_source = self._get_database_source(
  File ".local/lib/python3.10/site-packages/wordfence/cli/malwarescan/malwarescan.py", line 268, in _get_database_source
    with tempfile.NamedTemporaryFile(
  File "/usr/lib/python3.10/tempfile.py", line 696, in NamedTemporaryFile
    prefix, suffix, dir, output_type = _sanitize_params(prefix, suffix, dir)
  File "/usr/lib/python3.10/tempfile.py", line 255, in _sanitize_params
    output_type = _infer_return_type(prefix, suffix, dir)
  File "/usr/lib/python3.10/tempfile.py", line 236, in _infer_return_type
    raise TypeError("Can't mix bytes and non-bytes in "
TypeError: Can't mix bytes and non-bytes in path components.