el moussirachid,

You need to install the netifaces python module. 

sudo pip3 install netifaces

Regards,
Nikhilkrishnan

thanks for your answer 

i installed netifaces as you said  but when want to install or update any module i got this error

- Default Theme (Installé) 

and when i open module sales and module point of sales i got this error 

Traceback (most recent call last):
  File "/odoo/odoo-server/odoo/fields.py", line 937, in __get__
    value = record.env.cache.get(record, self)
  File "/odoo/odoo-server/odoo/api.py", line 960, in get
    value = self._data[field][record.id][key]
KeyError: <odoo.api.Environment object at 0x7f3c71a6fc18>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/odoo/odoo-server/odoo/http.py", line 650, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/odoo/odoo-server/odoo/http.py", line 310, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/odoo/odoo-server/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/odoo/odoo-server/odoo/http.py", line 692, in dispatch
    result = self._call_function(**self.params)
  File "/odoo/odoo-server/odoo/http.py", line 342, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/odoo/odoo-server/odoo/service/model.py", line 97, in wrapper
    return f(dbname, *args, **kwargs)
  File "/odoo/odoo-server/odoo/http.py", line 335, in checked_call
    result = self.endpoint(*a, **kw)
  File "/odoo/odoo-server/odoo/http.py", line 936, in __call__
    return self.method(*args, **kw)
  File "/odoo/odoo-server/odoo/http.py", line 515, in response_wrap
    response = f(*args, **kw)
  File "/odoo/odoo-server/addons/web/controllers/main.py", line 1224, in load
    action = request.env[action_type].browse([action_id]).read()
  File "/odoo/odoo-server/odoo/addons/base/ir/ir_actions.py", line 207, in read
    result = super(IrActionsActWindow, self).read(fields, load=load)
  File "/odoo/odoo-server/odoo/models.py", line 2601, in read
    values[name] = field.convert_to_read(record[name], record, use_name_get)
  File "/odoo/odoo-server/odoo/models.py", line 4758, in __getitem__
    return self._fields[key].__get__(self, type(self))
  File "/odoo/odoo-server/odoo/fields.py", line 941, in __get__
    self.determine_value(record)
  File "/odoo/odoo-server/odoo/fields.py", line 1052, in determine_value
    self.compute_value(recs)
  File "/odoo/odoo-server/odoo/fields.py", line 1008, in compute_value
    self._compute_value(records)
  File "/odoo/odoo-server/odoo/fields.py", line 999, in _compute_value
    getattr(records, self.compute)()
  File "/odoo/odoo-server/odoo/addons/base/ir/ir_actions.py", line 167, in _compute_search_view
    fvg = self.env[act.res_model].fields_view_get(act.search_view_id.id, 'search')
  File "/odoo/odoo-server/addons/mail/models/mail_thread.py", line 370, in fields_view_get
    res = super(MailThread, self).fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar, submenu=submenu)
  File "/odoo/odoo-server/odoo/models.py", line 1381, in fields_view_get
    xarch, xfields = View.postprocess_and_fields(self._name, etree.fromstring(result['arch']), view_id)
  File "/odoo/odoo-server/odoo/addons/base/ir/ir_ui_view.py", line 1054, in postprocess_and_fields
    self.raise_view_error(message, view_id)
  File "/odoo/odoo-server/odoo/addons/base/ir/ir_ui_view.py", line 509, in raise_view_error
    raise ValueError(message)
ValueError: Le champ `pos_config_id` n'existe pas

Contexte de l'erreur :
Vue `sale.order.search.inherit.quotation`
[view_id: 647, xml_id: sale.sale_order_view_search_inherit_quotation, model: sale.order, parent_id: 646]

el moussi rachid

• Go to the the terminal and install netifaces.

• sudo pip install netifaces

Thank You