UnknownLocaleError: unknown locale 'locale'

[ikezi]

How to Reproduce

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

(please provide additional details here)

Request parameters:

{'panel_id': None}

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36

System Information

Trac	0.12.3
Babel	0.9.6
Genshi	0.6
mod_python	3.3.1
pysqlite	2.6.0
Python	2.7.3 (default, Apr 13 2012, 20:15:24) [GCC 4.6.3 20120306 (Red Hat 4.6.3-2)]
pytz	2010h
setuptools	0.6
SQLite	3.7.7.1
jQuery	1.4.4

Enabled Plugins

TracGanttCalendarPlugin

0.6.2

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/trac/web/main.py", line 522, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.7/site-packages/trac/web/main.py", line 243, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.7/site-packages/trac/prefs/web_ui.py", line 77, in process_request
    template, data = chosen_provider.render_preference_panel(req, panel_id)
  File "/usr/lib/python2.7/site-packages/trac/prefs/web_ui.py", line 109, in render_preference_panel
    locales = map(Locale.parse, get_available_locales())
  File "/usr/lib/python2.7/site-packages/babel/core.py", line 212, in parse
    return cls(*parse_locale(identifier, sep=sep))
  File "/usr/lib/python2.7/site-packages/babel/core.py", line 137, in __init__
    raise UnknownLocaleError(identifier)
UnknownLocaleError: unknown locale 'locale'

[Jun Omae]

InstallationIssue. That issue be caused by wrong trac/locale/locale directory. Try to reinstall Trac.