Laravel Echo not working: Receiving Database Notifications via Websockets

Trying to set up echo/pusher to receiving notifications on the admin panel as described here:
https://filamentphp.com/docs/3.x/notifications/database-notifications#using-echo-to-receive-new-database-notifications-with-websockets

Added the databaseNotifications() method to the AdminPanelProvider, as well as set databaseNotificationsPolling() to null for good measure.

Installed Laravel Echo both server side and admin side:
npm install --save-dev laravel-echo pusher-js
composer require pusher/pusher-php-server

Set up my env variables to send to Pusher. Pusher dashboard shows that, yes it does receive the messages, the little chart does increase over time. But the Clients Connected is stuck at 0.

Honestly this just might be me being a little tired at this time of the night.

Did a little bit of source diving on the notification blade code and decided to try this on the browser's console:
window.dispatchEvent(new CustomEvent('EchoLoaded'))
Result: TypeError: window.Echo is undefined

What do I need to do?
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