I am trying to create a form on my module, but when i try to open the form  y qet the next error:

Rastreo de error:
Error: [_.sprintf] huh?
    at Function.str_format.parse (http://localhost:8069/web/content/67-9091f7e/web.assets_common.js:192:12)
    at Object.str_format [as sprintf] (http://localhost:8069/web/content/67-9091f7e/web.assets_common.js:174:145)
    at Object.formatFloat [as float] (http://localhost:8069/web/content/68-9c4ee0c/web.assets_backend.js:1025:21)
    at Class._formatValue (http://localhost:8069/web/content/68-9c4ee0c/web.assets_backend.js:900:1237)
    at Class._formatValue (http://localhost:8069/web/content/68-9c4ee0c/web.assets_backend.js:918:20)
    at Class.prototype.<computed> [as _formatValue] (http://localhost:8069/web/content/67-9091f7e/web.assets_common.js:4615:488)
    at Class._prepareInput (http://localhost:8069/web/content/68-9c4ee0c/web.assets_backend.js:913:541)
    at Class._prepareInput (http://localhost:8069/web/content/68-9c4ee0c/web.assets_backend.js:919:98)
    at Class.prototype.<computed> [as _prepareInput] (http://localhost:8069/web/content/67-9091f7e/web.assets_common.js:4615:488)
    at Class._renderEdit (http://localhost:8069/web/content/68-9c4ee0c/web.assets_backend.js:914:105)

This is my view.xml code:

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
        <act_window id="action_lead_stage" name="Lead stages" res_model="leads.leads" view_mode="tree,form"/>

        <menuitem name="Leads-Woinfi" id="clientes_woinfi_menu_root"/>
        <!-- menu categories -->
        <menuitem name="Leads" id="clientes_woinfi.leads" parent="clientes_woinfi_menu_root" action="clientes_woinfi.action_lead_stage"/>

        <record id="view_form_lead_ui" model="ir.ui.view">
            <field name="name">view_form_lead_ui</field>
            <field name="model">leads.leads</field>
            <field name="arch" type="xml">
                <form>
                    <group>
                        <field name="nombre"/>
                        <field name="apellido"/>
                        <field name="dni"/>
                        <field name="municipio"/>
                        <field name="provincia"/>
                        <field name="email"/>
                        <field name="telefono"/>
                    </group>
                    <group>
                        <field name="asunto"/>
                        <field name="cuando"/>
                        <field name="ip"/>
                        <field name="procedencia"/>
                        <field name="tipo"/>
                        <field name="fecha"/>
                    </group>
                </form>
            </field>
        </record>
        <record id="view_list_lead_ui" model="ir.ui.view">
            <field name="name">view_list_lead_ui</field>
            <field name="model">leads.leads</field>
            <field name="arch" type="xml">
                <tree>
                    <field name="nombre"/>
                    <field name="apellido"/>
                    <field name="dni"/>
                    <field name="municipio"/>
                    <field name="provincia"/>
                    <field name="email"/>
                    <field name="telefono"/>
                    <field name="asunto"/>
                    <field name="cuando"/>
                    <field name="ip"/>
                    <field name="procedencia"/>
                    <field name="tipo"/>
                    <field name="fecha"/>
                </tree>
            </field>
        </record>
    </data>
</odoo>