UncaughtPromiseError in custom module in Odoo 18

Question

I have an issue where I get this error:

Error del cliente de Odoo

UncaughtPromiseError
Uncaught Promise > View types not defined tree found in act_window action 400

Occured on <my-server-ip>:8069 on 2025-02-26 16:28:05 GMT

aircraft_view.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="view_aircraft_form" model="ir.ui.view">
        <field name="name">warthunder.aircraft.form</field>
        <field name="model">warthunder.aircraft</field>
        <field name="type">form</field>
        <field name="arch" type="xml">
            <form>
                <sheet>
                    <field name="image" widget="image" class="oe_avatar"/>
                    <div class="oe_title">
                        <h1><field name="name" placeholder="Aircraft Name"/></h1>
                    </div>
                    <group>
                        <group>
                            <field name="battle_rating"/>
                            <field name="repair_cost"/>
                            <field name="nation"/>
                        </group>
                        <group>
                            <field name="pilot_id"/>
                            <field name="total_missions"/>
                        </group>
                    </group>
                    <notebook>
                        <page string="Description">
                            <field name="description"/>
                        </page>
                        <page string="Missions">
                            <field name="mission_ids"/>
                        </page>
                    </notebook>
                </sheet>
                <div class="oe_chatter">
                    <field name="message_follower_ids"/>
                    <field name="message_ids"/>
                </div>
            </form>
        </field>
    </record>
    <record id="view_aircraft_list" model="ir.ui.view">
        <field name="name">warthunder.aircraft.list</field>
        <field name="model">warthunder.aircraft</field>
        <field name="type">list</field>
        <field name="priority">1</field>
        <field name="arch" type="xml">
            <list>
                <field name="name"/>
                <field name="battle_rating"/>
                <field name="nation"/>
                <field name="pilot_id"/>
                <field name="total_missions"/>
            </list>
        </field>
    </record>
    <record id="view_aircraft_search" model="ir.ui.view">
        <field name="name">warthunder.aircraft.search</field>
        <field name="model">warthunder.aircraft</field>
        <field name="type">search</field>
        <field name="arch" type="xml">
            <search>
                <field name="name"/>
                <field name="nation"/>
                <field name="pilot_id"/>
                <group expand="1" string="Group By">
                    <filter string="Nation" name="group_by_nation" context="{'group_by': 'nation'}"/>
                    <filter string="Pilot" name="group_by_pilot" context="{'group_by': 'pilot_id'}"/>
                </group>
            </search>
        </field>
    </record>
    <record id="action_aircraft" model="ir.actions.act_window">
        <field name="name">Aircraft</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">warthunder.aircraft</field>
        <field name="view_mode">list,form</field>
        <field name="search_view_id" ref="view_aircraft_search"/>
        <field name="help" type="html">
            <p class="o_view_nocontent_smiling_face">
                Create your first aircraft!
            </p>
        </field>
    </record>
    <record id="view_aircraft_list" model="ir.ui.view">
        <field name="name">warthunder.aircraft.list</field>
        <field name="model">warthunder.aircraft</field>
        <field name="arch" type="xml">
            <list>
                <field name="name"/>
                <field name="battle_rating"/>
                <field name="nation"/>
                <field name="pilot_id"/>
                <field name="total_missions"/>
            </list>
        </field>
    </record>
</odoo>

menu_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <!-- Actions -->
    <record id="action_warthunder_aircraft" model="ir.actions.act_window">
        <field name="name">Aircraft</field>
        <field name="res_model">warthunder.aircraft</field>
        <field name="view_mode">list,form</field>
    </record>

    <record id="action_warthunder_mission" model="ir.actions.act_window">
        <field name="name">Missions</field>
        <field name="res_model">warthunder.mission</field>
        <field name="view_mode">list,form</field>
    </record>

    <record id="action_warthunder_pilot_stats" model="ir.actions.act_window">
        <field name="name">Pilot Stats</field>
        <field name="res_model">warthunder.pilot.stats</field>
        <field name="view_mode">list,form</field>
    </record>

    <!-- Main menu -->
    <menuitem id="menu_warthunder_root"
              name="War Thunder"
              sequence="10"/>

    <!-- Sub menus -->
    <menuitem id="menu_warthunder_aircraft"
              name="Aircraft"
              parent="menu_warthunder_root"
              action="action_warthunder_aircraft"
              sequence="10"/>

    <menuitem id="menu_warthunder_mission"
              name="Missions"
              parent="menu_warthunder_root"
              action="action_warthunder_mission"
              sequence="20"/>

    <menuitem id="menu_warthunder_stats"
              name="Pilot Stats"
              parent="menu_warthunder_root"
              action="action_warthunder_pilot_stats"
              sequence="30"/>
</odoo>

mission_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="view_mission_form" model="ir.ui.view">
        <field name="name">warthunder.mission.form</field>
        <field name="model">warthunder.mission</field>
        <field name="arch" type="xml">
            <form>
                <sheet>
                    <group>
                        <field name="name"/>
                        <field name="date"/>
                        <field name="aircraft_id"/>
                        <field name="result"/>
                    </group>
                </sheet>
                <div class="oe_chatter">
                    <field name="message_follower_ids"/>
                    <field name="message_ids"/>
                </div>
            </form>
        </field>
    </record>

    <record id="view_mission_list" model="ir.ui.view">
        <field name="name">warthunder.mission.list</field>
        <field name="model">warthunder.mission</field>
        <field name="arch" type="xml">
            <list>
                <field name="name"/>
                <field name="date"/>
                <field name="aircraft_id"/>
                <field name="result"/>
            </list>
        </field>
    </record>

    <record id="action_warthunder_mission" model="ir.actions.act_window">
        <field name="name">Missions</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">warthunder.mission</field>
        <field name="view_mode">list,form</field>
        <field name="help" type="html">
            <p class="o_view_nocontent_smiling_face">
                Create your first mission!
            </p>
        </field>
    </record>
</odoo>

pilot_stats_view.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="view_pilot_stats_list" model="ir.ui.view">
        <field name="name">warthunder.pilot.stats.list</field>
        <field name="model">warthunder.pilot.stats</field>
        <field name="arch" type="xml">
            <list>
                <field name="pilot_id"/>
                <field name="total_missions"/>
                <field name="victories"/>
                <field name="defeats"/>
                <field name="win_rate" widget="percentage"/>
            </list>
        </field>
    </record>

    <record id="action_warthunder_pilot_stats" model="ir.actions.act_window">
        <field name="name">Pilot Statistics</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">warthunder.pilot.stats</field>
        <field name="view_mode">list</field>
        <field name="help" type="html">
            <p class="o_view_nocontent_smiling_face">
                No statistics available yet!
            </p>
        </field>
    </record>
</odoo>

I had many treeviews which I changed for list views because it seems that in odoo 18 tree views are no longer a thing anymore, I've searched in Google and even tried asking AI, they all give me the same answer: Replace all tree tags for list tags