开发环境时ubuntu10.10 python 2.6.5
当我执行./mangage.py runserver 启动服务器时，出现：
Validating models...
Raven is not configured (logging is disabled). Please see the documentation for more information.
16:51:54 raven.contrib.django.client.DjangoClient:INFO Raven is not configured (logging is disabled). Please see the documentation for more information. :/home/tclxa/.virtualenvs/zamboni/lib/python2.6/site-packages/raven/base.py:188
0 errors found
Django version 1.4.8, using settings 'settings_local'
Development server is running at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
但当我打开浏览器，输入http://127.0.0.1:8000/时，出现：
A server error occurred. Please contact the administrator.