Hey! @AyoDaisy your problem lies with the Disable Input Node.
To make the pop up disappear:
after the play montage node either on the on completed or on blend out connection set the visibility back to false.
To give the ability to move back:
use the Enable input node as you are disabling input after you play the sound so you would need to enable it again, maybe before or after you set the visibility back to false, however that is up to you.