Push notifications: Argument of type registrationError is not assignable to parameter of type pushNotification ActionPerformed

I just updated to Capacitor 4 and my Ionic React app is failing to build with the following message:

No overload matches this call.
The last overload gave the following error.
Argument of type ‘“registrationError”’ is not assignable to parameter of type ‘“pushNotificationActionPerformed”’.

Here’s the code at issue in index.tsx:

        PushNotifications.addListener('registrationError', (error: JSON) => {
          debugLog('push registration error', error);

I checked the docs for Push Notifications but registrationError is still listed in the Example section.

Any idea what’s going on here?