getFCMToken is returning undefined

I have a curious problem

I can configure the iOS push notifications correctly. But after a few days the users start to say they can't get the notifications. I think the issue are with the certificates so I change either the develop and the production certificates but no luck.
Then I try to generate an APN auth key but the result was the same.

All I can get in the log is this (I use the push controller of the example):

'TOKEN (getFCMToken)', undefined
'APNS TOKEN (getFCMToken)', ''

I think maybe need to wait to ask to Firebase for the token so I put a delay of a minute to request for the token but nothing changes.

My RN version is 0.48.1 and react-native-fcm: 9.1.0 ?
The problem is only on iOS on Android the notifications seems to work fine