Admin-Ui-Extensions Not Found (404) - Authenticate Requests Between An Extension And Backend Server

[den232]

Hello, I'm attempting to authenticate requests between an extension and an app's backend server, but running into a brick wall ...

Instructions here: https://shopify.dev/docs/api/admin-extensions#app-authentication

My test page is exactly like the example, the straight javascript version,

(except that I had to add a "/" in the import '/@shopify/admin-ui-extensions' instead of '@shopify/admin-ui-extensions')

I did a npm install of this, and can see stuff that was installed.

`import {extend, TextField} from '/@shopify/admin-ui-extensions';

async function eRunTest(argObject) {

function MyExtension(root, api) {
	const sessionToken = api.sessionToken;

	const text = root.createComponent(TextField, {
		disabled: true,
		value: '',
		label: 'Session Token',
	});

	sessionToken.getSessionToken().then((newToken) => {
		text.updateProps({
			value: newToken,
		});
	});

	root.appendChild(text);
	root.mount();
}

extend('MyExtensionPoint', MyExtension); }

`
But I get the error

https://cdn.shopify.com/@shopify/admin-ui-extensions net::ERR_ABORTED 404 (Not Found)

I did a npm install of this, and can see stuff that was installed.

Any suggestions? Thanks!