Custom emojis and categories example not working

[rickstaa]

I just tried the custom emojis and categories example of the README (i.e., https://github.com/missive/emoji-mart#custom-emojis). I, however, keep getting an Exception has occurred: TypeError: Cannot read properties of undefined (reading 'id') error. I tried debugging the emoji-mart code but could not yet find what was causing the error.

Current behaviour

The picker throws an error and removes all other emojis (see video below).

React.App.-.Brave.2022-08-26.21-32-14.mp4

Expected behaviour

The picker should display the custom emojis.

How to reproduce

1. Clone the example repository https://github.com/rickstaa/custom-emoji-test.
2. Install the dependencies npm i.
3. Start the development server npm start
4. Open localhost:3000.
5. Click on the OctoCat icon.
6. See the error appearing and the picker breaking.

[rickstaa]

Amazing thanks! Looking forward to the release.