A message (like the one displayed in the video thumbnail below) will appear when you attempt to create a beep without registering/logging-in to your account.

Video guide on what to do:

Steps:

1. Click “OK” on that pop-up message.

2. On your browser’s extension toolbar, click on the Beep icon.

3. Register or login using your Google account or another email of your choice.

4. Type in your preferred username when prompted.

5. Type your name in the field when prompted to.

6. Select an avatar from the choices given.

7. Done, you can now create a beep (to learn how, read this article).