In Odoo 14, I'm trying to add some templates that inherits `portal.frontend_layout`. But it's throwing `Element '< xpath expr="//head/link[last()]" >' cannot be located in parent view.`

In portal.frontend_layout, inherits web.frontend_layout, where I can see that `//head/link[last()]` code is there & the inherited web.layout DOES has link inside head tag.

Is it an issue on the base code? or something wrong in my inherited view?

This is my sample code:

    < template id="website_menu_header_customized" 
            inherit_id="portal.frontend_layout" 
            name="Header Language Link" >
....