Hi,

You need to define ''t-att-data-oe-model' and 't-att-data-oe-id' ' in your external_layout.

Like this:

<div class="article o_report_layout_standard" t-att-data-oe-model="o and o._name" t-att-data-oe-id="o and o.id">

    <t t-call="web.address_layout"/>

    <t t-raw="0"/>

</div>

Regards