Hi,

It looks like the issue might be with how the report action is defined in your XML. Here's a basic example of how a report action should look:

xml

<record id="action_for_report" model="ir.actions.report">
    <field name="name">Name Of The Report</field>
    <field name="model">sale.order</field>
    <field name="report_type">qweb-pdf</field>
    <field name="report_file">custom_module_name.template_id</field>
    <field name="report_name">custom_module_name.template_id</field>
    <field name="binding_model_id" ref="sale.model_sale_order"/>
    <field name="binding_type">report</field>
</record>

Here are a couple of things to keep in mind:

• The model field should match the technical name of the model you're reporting on (e.g., sale.order).
• If you want the report to be accessible via the Print button on the model's form view, you need to set the binding_model_id accordingly. For example, for sale.order, the reference should be sale.model_sale_order.

I recommend checking out this tutorial on creating a PDF report in Odoo 15. It explains everything step-by-step:

https://www.cybrosys.com/blog/how-to-create-a-pdf-report-in-odoo-15

Hope it helps