When I try and follow the instructions on how to create a Modal Pop-Up, I receive the following message and the modal does not display when creating a new board:
Miro didn't create this app.
Miro has not reviewed this app or its permissions.
Please let me know how I can get the modal to work as explained in the documentation.
The best way of doing this will be to create a new app following this guide. You can then update the demo application to implement the openModal method.
You have an example of how we implemented a button in an app that opens a modal here and another one here.