Also there are problem with starting seafdav server via missing pip3 install wsgidav, and even after installing - I got the error:
$ /usr/bin/python3 -m wsgidav.server.server_cli --server gunicorn --root / --log-file /opt/seafile-server/logs/seafdav.log --pid /opt/seafile-server/pids/seafdav.pid --port 8080 --host 0.0.0.0
Traceback (most recent call last):
File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/usr/local/lib/python3.6/dist-packages/wsgidav/server/server_cli.py", line 38, in <module>
from wsgidav import __version__, util
File "/usr/local/lib/python3.6/dist-packages/wsgidav/util.py", line 12, in <module>
from wsgidav import compat
File "/usr/local/lib/python3.6/dist-packages/wsgidav/compat.py", line 15, in <module>
from six.moves import (
ImportError: cannot import name 'collections_abc'
How can I fix it?