连接到ckanext showcase的CKAN中的站点包错误

虽然安装没有引起任何错误,并且当我设置为showcase管理员的一些用户开始添加showcase时,我能够添加一些showcase,但该模块已停止工作。

The page {portal.url/showcase} can't be viewed unless I am connected as system administrator. When a user or even a showcase user tries to enter the page get's an internal server error.

From that point on when I am trying to create a new system administrator from console with the paster command (http://docs.ckan.org/en/latest/maintaining/getting-started.html#create-admin-user) I get the bellow message
Traceback (most recent call last):
File "/usr/lib/ckan/default/lib/python2.7/site.py", line 703, in
main()
File "/usr/lib/ckan/default/lib/python2.7/site.py", line 683, in main
paths_in_sys = addsitepackages(paths_in_sys)
File "/usr/lib/ckan/default/lib/python2.7/site.py", line 282, in addsitepackages
addsitedir(sitedir, known_paths)
File "/usr/lib/ckan/default/lib/python2.7/site.py", line 204, in addsitedir
addpackage(sitedir, name, known_paths)
File "/usr/lib/ckan/default/lib/python2.7/site.py", line 173, in addpackage
exec(line)
File "", line 1, in
KeyError: 'ckanext'

任何帮助都将不胜感激