GRPCUnavailableError:UNAVAILABLE: No connection established

It's just happened when trying running the quick-start in the redmi file

const { Etcd3 } = require('etcd3');
const client = new Etcd3();

(async () => {
    await client.put('foo').value('bar');

    const fooValue = await client.get('foo').string();
    console.log('foo was:', fooValue);

    const allFValues = await client.getAll().prefix('f').keys();
    console.log('all our keys starting with "f":', allFValues);

    await client.delete().all();
})();

The output error is:

node:internal/process/promises:279
            triggerUncaughtException(err, true /* fromPromise */);
            ^
GRPCUnavailableError: 14 UNAVAILABLE: No connection established

Node version is 17.6.0

Start by reproducing the quick-start snippet from the reported file with Node.js 17.6.0 and inspect how the client establishes its connection. The payload names no source file, test, endpoint, or etcd setup, so first identify those details and determine whether the failure is environmental, documentation-related, or a client bug. Done means a reproducible diagnosis and a verified resolution.