Hi everyone,

I am trying to use otree 3.4 on my Mac M1 and even though I installed Python 3.7.12 and otree 3.4.0, when I launch otree devserver the following error pops up:

"Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/otree_startup/__init__.py", line 201, in do_django_setup
    django.setup()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/apps/registry.py", line 91, in populate
    app_config = AppConfig.create(entry)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/apps/config.py", line 90, in create
    module = import_module(entry)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 965, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'captcha'"

I tried to install captcha but without success, as it requires something called "Pillow" which I cannot install.
Could someone help me out?

Thanks a lot!