PNP needs access to your microphone (and camera for the Reaction Recorder) for features like Talk to Santa and the Reaction Recorder. If Santa can't hear you, check these permissions.
In your web browser
When the browser asks to use your microphone, click Allow. If you blocked it by mistake, click the icon to the left of the address bar, set Microphone to Allow and reload the page.
iPhone or iPad (PNP app)
Android (PNP app)
Mac
Windows
Then reload the page or restart the app and try again.