I put the groups on a view that I inherited the CRM module. Can you tell me what does not work?

<record model="ir.ui.view" id="crm_case_kanban_view_leads_inherit">
                <field name="name">CRM - Leads Kanban Inherit</field>
                <field name="model">crm.lead</field>
                <field name="inherit_id" ref="crm.crm_case_kanban_view_leads"/>
                <field name="arch" type="xml">
                    <xpath expr="//div[@class='oe_kanban_content']/div" position="replace">
                        <div groups="base.group_user">
                         <b><field name="name"/></b>
                          <t t-if="record.planned_revenue.raw_value">
                            - <i><t t-esc="record.planned_revenue.value"/>
                            <field name="company_currency"/></i>
                          </t>    
                        </div>                              
                    </xpath>
                </field>
            </record>

You can use groups in that fields to limit the access to the field.  Groups can be added in the fields definition (you need to inherit the model) or in the view definition (you need to inherit the view).