[ERROR] - rascal error not sending queue using typescript

[restuwahyu13]

Error: Unknown publication: demo_pub
    at Broker.publish (/home/antimalware/Desktop/real-project/hydeliving-api/node_modules/rascal/lib/amqp/Broker.js:156:42)
    at Broker.publish (/home/antimalware/Desktop/real-project/hydeliving-api/node_modules/rascal/lib/amqp/Broker.js:154:45)
    at /home/antimalware/Desktop/real-project/hydeliving-api/node_modules/rascal/lib/amqp/BrokerAsPromised.js:42:23
    at new Promise (<anonymous>)
    at BrokerAsPromised.self.<computed> [as publish] (/home/antimalware/Desktop/real-project/hydeliving-api/node_modules/rascal/lib/amqp/BrokerAsPromised.js:41:14)
    at Timeout._onTimeout (/home/antimalware/Desktop/real-project/hydeliving-api/index.ts:33:38)
    at listOnTimeout (node:internal/timers:559:17)
    at processTimers (node:internal/timers:502:7)

i try this code from example documentation, why this not working for me ?

import Broker from 'rascal'
;(async () => {
    try {
        const broker = await Broker.BrokerAsPromised.create({
            vhosts: {
                '/': {
                    connection: {
                        hostname: 'localhost',
                        user: 'restuwahyu13',
                        password: 'restuwahyu13',
                        port: 5672,
                        protocol: 'amqp'
                    }
                }
            }
        })
        broker.on('error', console.error)

        try {
            const subscription = await broker.subscribe('demo_sub')
            subscription
                .on('message', function (message, content, ackOrNack) {
                    console.log(content)
                    ackOrNack()
                })
                .on('error', console.error)
        } catch (err) {
            console.error(err)
        }

        setInterval(async function () {
            try {
                const publication = await broker.publish('demo_pub', new Date().toISOString() + ': hello world')
                publication.on('error', console.error)
            } catch (err) {
                console.error(err)
            }
        }, 1000)
    } catch (err) {
        console.error(err)
    }
})()