I have a python module I want to add JS Functionality to it. This is how I have specified the templates:

record id="actions_oracle_client" model="ir.actions.client">
        field name="name">mymodule
        field name="tag">mymodule.OracleServices
        field name="target">main
/record>

Removed some symbols because the xml would render in "code" block.  I also have this xml:

?xml version="1.0" encoding="UTF-8" ?>
templates xml:space="preserve">
    t t-name="mymodule.OracleServices" owl="1">
        div class="o_action">

        /div>
    /t>
/templates>

and finally the js:

/** @odoo-module */
import { registry } from "@web/core/registry";
import { Layout } from "@web/search/layout";
import { getDefaultConfig } from "@web/views/view";

import { Component, useSubEnv } from "@odoo/owl";

export class OracleServices extends Component {
    setup(){
        useSubEnv({
            config: {
                ... getDefaultConfig(),
                ... this.env.config,
            },
        });
    }
}

OracleServices.template = "mymodule.OracleServices";
OracleServices.components = { Layout };

registry.category("actions").add("mymodule.OracleServices", OracleServices)

So now I do wonder why do I have this error: 

UncaughtPromiseError > OwlError

Uncaught Promise > Missing template: "mymodule.OracleServices" (for component "OracleServices")