Since https://github.com/odoo/odoo/pull/120915 Steps: - Install `web_studio` and `hr_expense` - Open Expense/list view - click on optional column - Traceback The error occurs because the dropdown needs the id of the view list in order to "hook" onto it. This unique id is added via a `t-att-class` here https://github.com/odoo/odoo/blob/saas-16.3/addons/web/static/src/views/list/list_renderer.xml#L7 and is used by the dropdown here https://github.com/odoo/odoo/blob/saas-16.3/addons/web/static/src/views/list/list_renderer.xml#L50 The problem here is that the hr_expense module inherits from `web.ListRenderer` to add some classes to `o_list_renderer` with this ``xml <xpath expr="//div[hasclass('o_list_renderer')]" position="attributes"> <attribute name="t-att-class">'hr_expense h-auto o_forbidden_tooltip_parent'</attribute> </xpath> ``` but by doing so, the t-att-class of `hr_expense.ListRenderer` overwrites that of `web.ListRenderer`. One solution was to do as the documents application does https://github.com/odoo/enterprise/blob/saas-16.3/documents/static/src/views/list/documents_list_renderer.xml#L5 This does not override the `t-att-class` opw-3858726 closes odoo/odoo#161846 X-original-commit: e4f222f0f05565301515ca020de3ae19c35bef06 Signed-off-by: de Wouters de Bouchout Jean-Benoît (jbw) <jbw@odoo.com> Signed-off-by: Achraf Ben Azzouz (abz) <abz@odoo.com>