Hi, 

We have currently got Odoo 10.0 (community Edition) installed as our main system we thought it was about time for us to host our website via odoo to keep everything linked together however when we go to install eCommerce we get the following error: 

Traceback (most recent call last):
  File "/opt/odoo/odoo/http.py", line 642, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/odoo/http.py", line 684, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo/odoo/http.py", line 334, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo/odoo/service/model.py", line 101, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo/odoo/http.py", line 327, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo/odoo/http.py", line 942, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo/odoo/http.py", line 507, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo/addons/web/controllers/main.py", line 896, in call_button
    action = self._call_kw(model, method, args, {})
  File "/opt/odoo/addons/web/controllers/main.py", line 884, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/opt/odoo/odoo/api.py", line 689, in call_kw
    return call_kw_multi(method, model, args, kwargs)
  File "/opt/odoo/odoo/api.py", line 680, in call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/opt/odoo/odoo/addons/base/module/module.py", line 411, in button_immediate_install
    return self._button_immediate_function(type(self).button_install)
  File "/opt/odoo/odoo/addons/base/module/module.py", line 485, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/opt/odoo/odoo/modules/registry.py", line 83, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/opt/odoo/odoo/modules/loading.py", line 339, in load_modules
    loaded_modules, update_module)
  File "/opt/odoo/odoo/modules/loading.py", line 237, in load_marked_modules
    loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)
  File "/opt/odoo/odoo/modules/loading.py", line 159, in load_module_graph
    _load_data(cr, module_name, idref, mode, kind='demo')
  File "/opt/odoo/odoo/modules/loading.py", line 95, in _load_data
    tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)
  File "/opt/odoo/odoo/tools/convert.py", line 845, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "/opt/odoo/odoo/tools/convert.py", line 915, in convert_xml_import
    obj.parse(doc.getroot(), mode=mode)
  File "/opt/odoo/odoo/tools/convert.py", line 799, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/opt/odoo/odoo/tools/convert.py", line 695, in _tag_record
    f_val = self.id_get(f_ref)
  File "/opt/odoo/odoo/tools/convert.py", line 782, in id_get
    res = self.model_id_get(id_str, raise_if_not_found)
  File "/opt/odoo/odoo/tools/convert.py", line 788, in model_id_get
    return self.env['ir.model.data'].xmlid_to_res_model_res_id(id_str, raise_if_not_found=raise_if_not_found)
  File "/opt/odoo/odoo/addons/base/ir/ir_model.py", line 1083, in xmlid_to_res_model_res_id
    return self.xmlid_lookup(xmlid)[1:3]
  File "<decorator-gen-5>", line 2, in xmlid_lookup
  File "/opt/odoo/odoo/tools/cache.py", line 87, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/opt/odoo/odoo/addons/base/ir/ir_model.py", line 1072, in xmlid_lookup
    raise ValueError('External ID not found in the system: %s' % xmlid)
ParseError: "External ID not found in the system: portal.partner_demo_portal" while parsing /opt/odoo/addons/website_portal_sale/data/sale_demo.xml:4, near
<record id="sale_order_1" model="sale.order">
            <field name="partner_id" ref="portal.partner_demo_portal"/>
            <field name="partner_invoice_id" ref="portal.partner_demo_portal"/>
            <field name="partner_shipping_id" ref="portal.partner_demo_portal"/>
            <field name="user_id" ref="base.user_root"/>
            <field name="pricelist_id" ref="product.list0"/>
            <field name="state">sent</field>
            <field name="team_id" ref="sales_team.team_sales_department"/>
            <field name="date_order" eval="(DateTime.today() - relativedelta(months=1)).strftime('%Y-%m-%d %H:%M')"/>
            <field name="message_partner_ids" eval="[(4, ref('portal.partner_demo_portal'))]"/>
        </record>

Any input will be greatly appreciated!