I'm extending gantt view to add new button. The button is working. The problem is when i try to use RPC or ORM, I got this error

`Uncaught Promise > Cannot read properties of null (reading 'component')` 

I think GanttController is extending AbstractController

Here is the javascript 

/** @odoo-module */

import { _t } from 'web.core';
import { useService } from "@web/core/utils/hooks";

export const ControllerMixin = {
    async _onMovePlanClick(ev) {
        // const rpc = useService('rpc');
        ev.preventDefault();
        $.exposed = {
            this:this,
            useService:useService
        };
        console.log(
            'ControllerMixin._onMovePlanClick'
        );
        const orm = useService("orm");
        const project_id = await orm.call('project.task', 'get_project_id', [this.context.active_id])
        this.do_action({
            name: _t('Move Plan'),
            type: 'ir.actions.act_window',
            res_model: 'project.task.move.plan.wizard',
            views: [[false, 'form']],
            target: 'new',
            context: {'default_project_id': project_id},
        })
        
    },

};

This is the python

class Task(models.Model):
    _inherit = "project.task"

    def get_project_id(self):
        return self.project_id.id

I test it without calling const orm = useService("orm");​. It's working fine. So the problem is when defining orm or rpc variable

In other case, I'm extending CharField and ORM is working fine