希望大神帮助，看下如何解决
2019-09-24 03:29:11,471 [ERROR] django.request:135 handle_uncaught_exception Internal Server Error: /repo/file_revisions/ad0378e2-f78e-472e-b78f-f381d41ab8c7/
Traceback (most recent call last):
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/exception.py”, line 41, in inner
response = get_response(request)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/base.py”, line 249, in _legacy_get_response
response = self._get_response(request)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/base.py”, line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/base.py”, line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File “/opt/seafile/seafile-server-7.0.4/seahub/seahub/auth/decorators.py”, line 27, in _wrapped_view
return view_func(request, *args, **kwargs)
File “/opt/seafile/seafile-server-7.0.4/seahub/seahub/views/init.py”, line 862, in file_revisions
suffix_list = seafevents_api.get_file_history_suffix()
AttributeError: ‘NoneType’ object has no attribute ‘get_file_history_suffix’