is -o required?

[hexylena]

$ ghevaluator -u https://usegalaxy.eu/u/helena-rasche/h/cwl-target-history-1 -w topics/genome-annotation/tutorials/annotation-with-prokka/workflows/Galaxy-Workflow-Workflow_constructed_from_history__prokka-workflow_.ga -a $GALAXY_API_KEY
Traceback (most recent call last):
  File "/home/user/arbeit/galaxy/training-material/.direnv/python-3.11/bin/ghevaluator", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/user/arbeit/galaxy/training-material/.direnv/python-3.11/lib64/python3.11/site-packages/ghevaluator/__main__.py", line 32, in main
    Path(args.output))
    ^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/pathlib.py", line 871, in __new__
    self = cls._from_parts(args)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/pathlib.py", line 509, in _from_parts
    drv, root, parts = self._parse_args(args)
                       ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/pathlib.py", line 493, in _parse_args
    a = os.fspath(a)
        ^^^^^^^^^^^^
TypeError: expected str, bytes or os.PathLike object, not NoneType