Trying to start Picard from source with Python 3.8 on Windows fails:

Traceback (most recent call last):
File ".\tagger.py", line 19, in <module>
main(os.path.join(basedir, 'locale'), True)
File ".\picard\tagger.py", line 907, in main
tagger = Tagger(picard_args, unparsed_args, localedir, autoupdate)
File ".\picard\tagger.py", line 226, in _init_
setup_gettext(localedir, config.setting["ui_language"], log.debug)
File ".\picard\i18n.py", line 82, in setup_gettext
trans.install(True)
File "C:\Program Files\Python38\lib\gettext.py", line 352, in install
for name in allowed & set(names):
TypeError: 'bool' object is not iterable

Seems to work on macOS