500: Internal Server Error

Traceback

Traceback (most recent call last):
  File "/odoo14/odoo14-server/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "/odoo14/odoo14-server/odoo/http.py", line 813, in dispatch
    r = self._call_function(**self.params)
  File "/odoo14/odoo14-server/odoo/http.py", line 370, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/odoo14/odoo14-server/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/odoo14/odoo14-server/odoo/http.py", line 358, in checked_call
    result = self.endpoint(*a, **kw)
  File "/odoo14/odoo14-server/odoo/http.py", line 919, in __call__
    return self.method(*args, **kw)
  File "/odoo14/odoo14-server/odoo/http.py", line 544, in response_wrap
    response = f(*args, **kw)
  File "/odoo14/odoo14-server/addons/website_blog/controllers/main.py", line 202, in blog
    values = self._prepare_blog_values(blogs=blogs, blog=blog, date_begin=date_begin, date_end=date_end, tags=tag, state=state, page=page, search=search)
  File "/odoo14/odoo14-server/addons/website_blog/controllers/main.py", line 139, in _prepare_blog_values
    'nav_list': self.nav_list(),
  File "/odoo14/odoo14-server/addons/website_blog/controllers/main.py", line 42, in nav_list
    groupby=["post_date"], orderby="post_date desc")
  File "/odoo14/odoo14-server/odoo/models.py", line 2399, in _read_group_raw
    result = [self._read_group_format_result(d, annotated_groupbys, groupby, domain) for d in data]
  File "/odoo14/odoo14-server/odoo/models.py", line 2399, in <listcomp>
    result = [self._read_group_format_result(d, annotated_groupbys, groupby, domain) for d in data]
  File "/odoo14/odoo14-server/odoo/models.py", line 2197, in _read_group_format_result
    tzinfo=tzinfo, locale=locale
  File "/usr/local/lib/python3.7/dist-packages/babel/dates.py", line 716, in format_datetime
    locale = Locale.parse(locale)
  File "/usr/local/lib/python3.7/dist-packages/babel/core.py", line 333, in parse
    raise UnknownLocaleError(input_id)
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/odoo14/odoo14-server/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "/odoo14/odoo14-server/odoo/http.py", line 813, in dispatch
    r = self._call_function(**self.params)
  File "/odoo14/odoo14-server/odoo/http.py", line 370, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/odoo14/odoo14-server/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/odoo14/odoo14-server/odoo/http.py", line 358, in checked_call
    result = self.endpoint(*a, **kw)
  File "/odoo14/odoo14-server/odoo/http.py", line 919, in __call__
    return self.method(*args, **kw)
  File "/odoo14/odoo14-server/odoo/http.py", line 544, in response_wrap
    response = f(*args, **kw)
  File "/odoo14/odoo14-server/addons/website_blog/controllers/main.py", line 202, in blog
    values = self._prepare_blog_values(blogs=blogs, blog=blog, date_begin=date_begin, date_end=date_end, tags=tag, state=state, page=page, search=search)
  File "/odoo14/odoo14-server/addons/website_blog/controllers/main.py", line 139, in _prepare_blog_values
    'nav_list': self.nav_list(),
  File "/odoo14/odoo14-server/addons/website_blog/controllers/main.py", line 42, in nav_list
    groupby=["post_date"], orderby="post_date desc")
  File "/odoo14/odoo14-server/odoo/models.py", line 2399, in _read_group_raw
    result = [self._read_group_format_result(d, annotated_groupbys, groupby, domain) for d in data]
  File "/odoo14/odoo14-server/odoo/models.py", line 2399, in <listcomp>
    result = [self._read_group_format_result(d, annotated_groupbys, groupby, domain) for d in data]
  File "/odoo14/odoo14-server/odoo/models.py", line 2197, in _read_group_format_result
    tzinfo=tzinfo, locale=locale
  File "/usr/local/lib/python3.7/dist-packages/babel/dates.py", line 716, in format_datetime
    locale = Locale.parse(locale)
  File "/usr/local/lib/python3.7/dist-packages/babel/core.py", line 333, in parse
    raise UnknownLocaleError(input_id)
babel.core.UnknownLocaleError: unknown locale 'en_FR'