Error:
Odoo Server Error

Traceback (most recent call last):
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 656, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 314, in _handle_exception
raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\tools\pycompat.py", line 87, in reraise
raise value
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 698, in dispatch
result = self._call_function(**self.params)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 346, in _call_function
return checked_call(self.db, *args, **kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\service\model.py", line 97, in wrapper
return f(dbname, *args, **kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 339, in checked_call
result = self.endpoint(*a, **kw)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 941, in __call__
return self.method(*args, **kw)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 519, in response_wrap
response = f(*args, **kw)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\web\controllers\main.py", line 966, in call_button
action = self._call_kw(model, method, args, {})
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\web\controllers\main.py", line 954, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\api.py", line 759, in call_kw
return _call_kw_multi(method, model, args, kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\api.py", line 746, in _call_kw_multi
result = method(recs, *args, **kwargs)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\purchase\models\purchase.py", line 334, in button_confirm
order.button_approve()
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\purchase_stock\models\purchase.py", line 87, in button_approve
self._create_picking()
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\purchase_stock\models\purchase.py", line 209, in _create_picking
picking = StockPicking.create(res)
File "<decorator-gen-289>", line 2, in create
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\api.py", line 461, in _model_create_multi
return create(self, [arg])
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\base_automation\models\base_automation.py", line 231, in create
action._process(action._filter_post(records))
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\base_automation\models\base_automation.py", line 205, in _process
self.action_server_id.with_context(**ctx).run()
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\base\models\ir_actions.py", line 569, in run
res = func(action, eval_context=eval_context)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\mail\models\ir_actions.py", line 116, in run_action_email
action.template_id.with_context(cleaned_ctx).send_mail(self._context.get('active_id'), force_send=False, raise_exception=False)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\mail\models\mail_template.py", line 518, in send_mail
values = self.generate_email(res_id)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\mail\models\mail_template.py", line 430, in generate_email
res_ids_to_templates = self.get_email_template(res_ids)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\mail\models\mail_template.py", line 364, in get_email_template
langs = self._render_template(self.lang, self.model, res_ids)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\mail\models\mail_template.py", line 321, in _render_template
records = self.env[model].browse(it for it in res_ids if it) # filter to avoid browsing [None]
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\api.py", line 831, in __getitem__
return self.registry[model_name]._browse((), self)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\modules\registry.py", line 176, in __getitem__
return self.models[model_name]
KeyError: False