DirectoryPath types in config are incompatible with Obspy MassDownloader

[2023-07-25 17:17:19,223: ERROR/ForkPoolWorker-7] Task waveqc.tasks.download_mseeds[5f9c7172-f370-4704-8801-a7fa817c510f] raised unexpected: TypeError("argument of type 'PosixPath' is not iterable")
Traceback (most recent call last):
  File "/home/panaysi/Projects/isterre/waveqc/venv/wave_qc-RaIltitd-py3.11/lib/python3.11/site-packages/celery/app/trace.py", line 477, in trace_task
    R = retval = fun(*args, **kwargs)
                 ^^^^^^^^^^^^^^^^^^^^
  File "/home/panaysi/Projects/isterre/waveqc/venv/wave_qc-RaIltitd-py3.11/lib/python3.11/site-packages/celery/app/trace.py", line 760, in __protected_call__
    return self.run(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/panaysi/Projects/isterre/waveqc/waveqc/tasks.py", line 104, in download_mseeds
    mdl.download(
  File "/home/panaysi/Projects/isterre/waveqc/venv/wave_qc-RaIltitd-py3.11/lib/python3.11/site-packages/obspy/clients/fdsn/mass_downloader/mass_downloader.py", line 207, in download
    helper.prepare_mseed_download()
  File "/home/panaysi/Projects/isterre/waveqc/venv/wave_qc-RaIltitd-py3.11/lib/python3.11/site-packages/obspy/clients/fdsn/mass_downloader/download_helpers.py", line 523, in prepare_mseed_download
    station.prepare_mseed_download(mseed_storage=self.mseed_storage)
  File "/home/panaysi/Projects/isterre/waveqc/venv/wave_qc-RaIltitd-py3.11/lib/python3.11/site-packages/obspy/clients/fdsn/mass_downloader/download_helpers.py", line 339, in prepare_mseed_download
    interval.filename = utils.get_mseed_filename(
                        ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/panaysi/Projects/isterre/waveqc/venv/wave_qc-RaIltitd-py3.11/lib/python3.11/site-packages/obspy/clients/fdsn/mass_downloader/utils.py", line 530, in get_mseed_filename
    elif ("{network}" in str_or_fct) and ("{station}" in str_or_fct) and \
          ^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: argument of type 'PosixPath' is not iterable

The solution is probably transforming STATIONXML_STORAGE_PATH and MSEED_STORAGE_PATH in strings before passing them to obspy