Hi everyone, i think it's because odoo don't find my class but i don't know how to fix it.

Here is my error:

Erreur:

Odoo Server Error

Traceback (most recent call last):

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 744, in parse

    self._tags[rec.tag](rec, de, mode=mode)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 572, in _tag_record

    model = self.env[rec_model]

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\api.py", line 760, in __getitem__

    return self.registry[model_name]._browse((), self)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\modules\registry.py", line 181, in __getitem__

    return self.models[model_name]

KeyError: 'project.data'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\http.py", line 650, in _handle_exception

    return super(JsonRequest, self)._handle_exception(exception)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\http.py", line 310, in _handle_exception

    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\pycompat.py", line 87, in reraise

    raise value

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\http.py", line 692, in dispatch

    result = self._call_function(**self.params)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\http.py", line 342, in _call_function

    return checked_call(self.db, *args, **kwargs)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\service\model.py", line 97, in wrapper

    return f(dbname, *args, **kwargs)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\http.py", line 335, in checked_call

    result = self.endpoint(*a, **kw)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\http.py", line 936, in __call__

    return self.method(*args, **kw)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\http.py", line 515, in response_wrap

    response = f(*args, **kw)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\addons\web\controllers\main.py", line 935, in call_button

    action = self._call_kw(model, method, args, {})

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\addons\web\controllers\main.py", line 923, in _call_kw

    return call_kw(request.env[model], method, args, kwargs)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\api.py", line 689, in call_kw

    return call_kw_multi(method, model, args, kwargs)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\api.py", line 680, in call_kw_multi

    result = method(recs, *args, **kwargs)

  File "<decorator-gen-46>", line 2, in button_immediate_upgrade

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\addons\base\module\module.py", line 71, in check_and_log

    return method(self, *args, **kwargs)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\addons\base\module\module.py", line 602, in button_immediate_upgrade

    return self._button_immediate_function(type(self).button_upgrade)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\addons\base\module\module.py", line 541, in _button_immediate_function

    modules.registry.Registry.new(self._cr.dbname, update_module=True)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\modules\registry.py", line 85, in new

    odoo.modules.load_modules(registry._db, force_demo, status, update_module)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\modules\loading.py", line 339, in load_modules

    force, status, report, loaded_modules, update_module)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\modules\loading.py", line 242, in load_marked_modules

    loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\modules\loading.py", line 159, in load_module_graph

    _load_data(cr, module_name, idref, mode, kind='demo')

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\modules\loading.py", line 94, in _load_data

    tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 791, in convert_file

    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 852, in convert_xml_import

    obj.parse(doc.getroot(), mode=mode)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 741, in parse

    self.parse(rec, mode)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 751, in parse

    exc_info[2]

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\pycompat.py", line 86, in reraise

    raise value.with_traceback(tb)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 744, in parse

    self._tags[rec.tag](rec, de, mode=mode)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\tools\convert.py", line 572, in _tag_record

    model = self.env[rec_model]

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\api.py", line 760, in __getitem__

    return self.registry[model_name]._browse((), self)

  File "C:\Program Files (x86)\Odoo 11.0\server\odoo\modules\registry.py", line 181, in __getitem__

    return self.models[model_name]

odoo.tools.convert.ParseError: "project.data" while parsing file:/c:/program files (x86)/odoo 11.0/server/odoo/addons/project/data/project_demo.xml:25, near

<record id="project_data_00" model="project.data">

            <field name="name">Test_24</field>

        </record>

Here is my class from project:

class ProjectData(models.Model):
    _name = "project.data"
    _description = "Data on the sinister"

    name = fields.Char(required=True)

Here is my record in project:

<record id="project_data_00" model="project.data">
    <field name="name">Test_24</field>
</record>

<record id="project_task_11" model="project.task">
    <field name="planned_hours" eval="16.0"/>
    <field name="remaining_hours" eval="16.0"/>
    <field name="user_id" ref="base.user_root"/>
    <field name="priority">1</field>
    <field name="project_id" ref="project.project_project_2"/>
    <field name="name">User interface improvements</field>
    <field name="tag_ids" eval="[(6, 0, [
            ref('project.project_tags_01'),
            ref('project.project_tags_03')])]"/>
    <field name="stage_id" ref="project_stage_1"/>
    <field name="data_id" eval="project.project_data_00"/>
</record>

Does anyone can help me pls?