Affter trying to set up a new sales order email template and removing the Context Action (from the actions list), I can't access the sales order menu anymore. The following error is displayed:

Traceback (most recent call last):
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 499, in _handle_exception
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 516, in dispatch
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 282, in _call_function
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\service\model.py", line 113, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 279, in checked_call
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 732, in __call__
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 375, in response_wrap
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\web\controllers\main.py", line 944, in call_kw
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\web\controllers\main.py", line 936, in _call_kw
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\mail\mail_thread.py", line 344, in fields_view_get
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\models.py", line 1593, in fields_view_get
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\calendar\calendar.py", line 619, in get
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\base\ir\ir_values.py", line 501, in get
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\base\ir\ir_values.py", line 458, in _map_legacy_model_list
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\base\ir\ir_values.py", line 500, in do_get
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\base\ir\ir_values.py", line 429, in get_actions
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20140920-000204\server\openerp\addons\base\ir\ir_actions.py", line 344, in read
IndexError: list index out of range

Thanks for any help.