Public method [mountAction] not found on component when adding an action to a form modal

Hi there!

I treid to add another button to the form modal, like in the documentation (https://filamentphp.com/docs/3.x/actions/modals#opening-another-modal-from-an-extra-footer-action), and I've got the following error when I press the button of the action:

Unable to call component method. Public method [mountAction] not found on component.
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