Azure Functions - Necesito ayuda para resolver un error relacionado con Firebase

Hola

Necesito un desarrollador de .Net que tenga experiencia colocando Azure functions en producción. He creado una Azure function que envía notificaciones PUSH mediante Firebase, usando el nuget FirebaseAdmin.
Tengo una arquitectura de capas y el proyecto funciona bien en modo local. Las notificaciones son enviadas y llegan a su destino, no obstante, al publicar en un portal interno de Azure, sale este error:


2022-11-11T18:03:03  Welcome, you are now connected to log-streaming service. The default timeout is 2 hours. Change the timeout with the App Setting SCM_LOGSTREAM_TIMEOUT (in seconds).
2022-11-11T18:04:00.033 [Information] Executing ‘SendPushNotifications’ (Reason=‘Timer fired at 2022-11-11T15:04:00.0271951-03:00’, Id=d2afee7a-7b9f-4305-b755-1f1e50266e86)
2022-11-11T18:04:00.148 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.176 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.185 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.191 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.199 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.207 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.214 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.221 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.230 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.237 [Error] No se pudo enviar push:System.ArgumentNullException : Value cannot be null. (Parameter ‘App argument must not be null.’)At FirebaseAdmin.Messaging.FirebaseMessaging.GetMessaging(FirebaseApp app)at async StoreVisibilityFunctionAzureDev.Infraestructura.Data.Servicios.NotificationsService.SendNotification(PushNotification pushNotification)at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()at async RedinFunctionAzure.Notifications.SendPushNotifications(TimerInfo myTimer,ILogger log) at /Users/vn0v4mv/Documents/LookApp/Desarrollo/LOOKAPP-azure-function2/StoreVisibilityFunctionAzure/Functions/Notifications.cs : 55
2022-11-11T18:04:00.246 [Information] Executed ‘SendPushNotifications’ (Succeeded, Id=d2afee7a-7b9f-4305-b755-1f1e50266e86, Duration=219ms)