seafile的seahbu.sh无法启动,求指导

[root@localhost seafile-server-7.1.4]# ./seahub.sh start-fastcgi

LC_ALL is not set in ENV, set to en_US.UTF-8
Starting seahub (fastcgi) at 127.0.0.1:8000 …
Traceback (most recent call last):
File “/opt/seafile/seafile-server-7.1.4/seahub/manage.py”, line 10, in
execute_from_command_line(sys.argv)
File “/opt/seafile/seafile-server-7.1.4/seahub/thirdpart/django/core/management/init.py”, line 364, in execute_from_command_line
utility.execute()
File “/opt/seafile/seafile-server-7.1.4/seahub/thirdpart/django/core/management/init.py”, line 338, in execute
django.setup()
File “/opt/seafile/seafile-server-7.1.4/seahub/thirdpart/django/init.py”, line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File “/opt/seafile/seafile-server-7.1.4/seahub/thirdpart/django/apps/registry.py”, line 85, in populate
app_config = AppConfig.create(entry)
File “/opt/seafile/seafile-server-7.1.4/seahub/thirdpart/django/apps/config.py”, line 94, in create
module = import_module(entry)
File “/usr/local/python3/lib/python3.6/importlib/init.py”, line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File “”, line 978, in _gcd_import
File “”, line 961, in _find_and_load
File “”, line 948, in _find_and_load_unlocked
ModuleNotFoundError: No module named ‘captcha’
Error:Seahub failed to start.

Python下安装下对应模块captcha
python3 -m pip install captcha