word在线浏览功能一直报错 下载了最新版本也一样

[2018-01-20 23:42:47,943] [WARNING] failed to convert <type: xls, id: 2332dac0531f27278e5e3303007468d55773eed2> from excel to html
[2018-01-20 23:42:47,943] [DEBUG] removing temporary document /tmp/tmp2wpX0N.xls
[2018-01-20 23:42:54,610] [DEBUG] start to fetch task <type: xls, id: 2332dac0531f27278e5e3303007468d55773eed2>
[2018-01-20 23:42:54,716] [WARNING] error when invoking libreoffice: Traceback (most recent call last):
File “/var/www/yun.aobo.biz/seafile-pro-server-6.2.4/pro/python/seafevents/office_converter/unoconv.py”, line 19, in
from distutils.version import LooseVersion
File “/usr/lib/python3.4/distutils/version.py”, line 29, in
import re
File “/usr/lib/python3.4/re.py”, line 336, in
import copyreg
File “/var/www/yun.aobo.biz/seafile-pro-server-6.2.4/seahub/thirdpart/future-0.16.0-py2.7.egg/copyreg/init.py”, line 7, in
raise ImportError('This package should not be accessible on Python 3. ’
ImportError: This package should not be accessible on Python 3. Either you are trying to run from the python-future src folder or your installation of python-future is corrupted.

[2018-01-20 23:42:54,716] [WARNING] failed to convert <type: xls, id: 2332dac0531f27278e5e3303007468d55773eed2> from excel to html
[2018-01-20 23:42:54,716] [DEBUG] removing temporary document /tmp/tmpbeboQJ.xls