Hello,

I install odoo version 10. When I create database without load demonstration data, database created properly but create database with load demonstration it will give following error

Database creation error: Wrong value for base.language.install.lang: u'en_US'

For above error following solution i have try 

ALTER ROLE <rolename> SET client_encoding = 'UTF8';

but now following error occur:

Traceback (most recent call last):
File "/home/super/.local/lib/python2.7/site-packages/werkzeug/serving.py", line 303, in run_wsgi
execute(self.server.app)
File "/home/super/.local/lib/python2.7/site-packages/werkzeug/serving.py", line 291, in execute
application_iter = app(environ, start_response)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/service/server.py", line 307, in app
return self.app(e, s)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/service/wsgi_server.py", line 186, in application
return application_unproxied(environ, start_response)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/service/wsgi_server.py", line 172, in application_unproxied
result = handler(environ, start_response)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 1326, in __call__
return self.dispatch(environ, start_response)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 1300, in __call__
return self.app(environ, start_wrapped)
File "/home/super/.local/lib/python2.7/site-packages/werkzeug/middleware/shared_data.py", line 220, in __call__
return self.app(environ, start_response)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 1499, in dispatch
result = ir_http._dispatch()
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_http.py", line 199, in _dispatch
return cls._handle_exception(e)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_http.py", line 169, in _handle_exception
return request._handle_exception(exception)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 775, in _handle_exception
return super(HttpRequest, self)._handle_exception(exception)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_http.py", line 195, in _dispatch
result = request.dispatch()
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 834, in dispatch
r = self._call_function(**self.params)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 334, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/service/model.py", line 101, in wrapper
return f(dbname, *args, **kwargs)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 330, in checked_call
result.flatten()
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 1277, in flatten
self.response.append(self.render())
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/http.py", line 1270, in render
return env["ir.ui.view"].render_template(self.template, self.qcontext)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_ui_view.py", line 1052, in render_template
return self.browse(self.get_view_id(template)).render(values, engine)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_ui_view.py", line 959, in get_view_id
return self.env['ir.model.data'].xmlid_to_res_id(template, raise_if_not_found=True)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_model.py", line 1108, in xmlid_to_res_id
return self.xmlid_to_res_model_res_id(xmlid, raise_if_not_found)[1]
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_model.py", line 1099, in xmlid_to_res_model_res_id
return self.xmlid_lookup(xmlid)[1:3]
File "<decorator-gen-6>", line 2, in xmlid_lookup

File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/tools/cache.py", line 87, in lookup
value = d[key] = self.method(*args, **kwargs)
File "/media/super/0c228924-96bf-4782-9b1e-673957fef194/sampada/eclipse-workspace/odoo10/odoo/addons/base/ir/ir_model.py", line 1088, in xmlid_lookup
raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: web.login

Not understand Why this happen.

any help

Regards