TypeError: 'NoneType' object is unsubscriptable: I simply can't used TRAC. Do I need to install something?

[vandewie]

How to Reproduce

While doing a GET operation on /wiki/TracGuide, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'page': u'TracGuide'}

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0

System Information

System information not available

Enabled Plugins

Plugin information not available

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/web/main.py", line 511, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/web/main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/wiki/web_ui.py", line 120, in process_request
    req.perm(page.resource).require('WIKI_VIEW')
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/perm.py", line 575, in require
    if not self._has_permission(action, resource):
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/perm.py", line 567, in _has_permission
    check_permission(action, perm.username, resource, perm)
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/perm.py", line 454, in check_permission
    perm)
  File "/snc/trac/projects/spc/plugins/SNC_authorization.py", line 140, in check_permission
    self.read_access_level(username)
  File "/snc/trac/projects/spc/plugins/SNC_authorization.py", line 50, in read_access_level
    is_site_admin = (row[0] == 1)
TypeError: 'NoneType' object is unsubscriptable

[Jun Omae]

PluginIssue (duplicate of #11192 and #12187).

Please stop reporting on this site. Instead, report it to authors of SNC_authorization.py.