I have installed the OpenERPv7 on my Synology DS1512+ NAS.

When I click on my oportunities link I get the following error (below). How can I fix this?

Client Traceback (most recent call last):
  File "/var/packages/OpenERP7.x/target/openerp/addons/web/http.py", line 195, in dispatch
    response["result"] = method(self, **self.params)
  File "/var/packages/OpenERP7.x/target/openerp/addons/web/controllers/main.py", line 1005, in search_read
    return self.do_search_read(req, model, fields, offset, limit, domain, sort)
  File "/var/packages/OpenERP7.x/target/openerp/addons/web/controllers/main.py", line 1040, in do_search_read
    records = Model.read(ids, fields or False, req.context)
  File "/var/packages/OpenERP7.x/target/openerp/addons/web/session.py", line 43, in proxy
    result = self.proxy.execute_kw(self.session._db, self.session._uid, self.session._password, self.model, method, args, kw)
  File "/var/packages/OpenERP7.x/target/openerp/addons/web/session.py", line 31, in proxy_method
    result = self.session.send(self.service_name, method, *args)
  File "/var/packages/OpenERP7.x/target/openerp/addons/web/session.py", line 104, in send
    raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)

Server Traceback (most recent call last):
  File "/var/packages/OpenERP7.x/target/openerp/addons/web/session.py", line 90, in send
    return openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/usr/local/lib/python2.7/site-packages/openerp/netsvc.py", line 295, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/usr/local/lib/python2.7/site-packages/openerp/service/web_services.py", line 614, in dispatch
    res = fn(db, uid, *params)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/osv.py", line 188, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/osv.py", line 131, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/osv.py", line 198, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/osv.py", line 185, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/orm.py", line 3604, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/orm.py", line 3724, in _read_flat
    res2 = self._columns[f].get(cr, self, ids, f, user, context=context, values=res)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/fields.py", line 1131, in get
    result = self._fnct(obj, cr, uid, ids, name, self._arg, context)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/fields.py", line 1197, in _fnct_read
    value = value[field] or False
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/orm.py", line 466, in __getitem__
    new_data[field_name] = browse_record(self._cr, self._uid, ref_id, obj, self._cache, context=self._context, list_class=self._list_class, fields_process=self._fields_process)
  File "/usr/local/lib/python2.7/site-packages/openerp/osv/orm.py", line 338, in __init__
    self._table_name = self._table._name
AttributeError: 'NoneType' object has no attribute '_name'