Internal Error to send FCM notification to web application - node.js

Question

I'm developing an internal client for triggering firebase cloud messaging push notifications.
With android devices it works without problems. however, when I try to send a notification to a pwa I get the message: FirebaseMessagingError: An internal error has occurred. Please retry the request
This is the code of the function I'm developing:
import admin from '../classes/FirebaseNotification.js';
const priority = 'high';
class FormatNotificationAndroid {
static sendNotification = (data) => {
let registrationTokens = data.devices;
let message = {
notification: {
title: data.notification.title,
body: data.notification.message,
}
};
let options = {
priority: priority,
timeToLive: data.notification.time_to_live
};
console.log(registrationTokens);
console.log(message);
console.log(options);
admin.messaging().sendToDevice(registrationTokens, message, options)
.then(response => {
console.log(response.results);
})
.catch(error => {
console.log(error);
});
}
}
export default FormatNotificationAndroid;
The error trace:
error: FirebaseMessagingError: An internal error has occurred. Please retry the request.
at FirebaseMessagingError.fromServerError (C:\projetos\firebase-send-message\node_modules\firebase-admin\lib\utils\error.js:254:16)
at C:\projetos\firebase-send-message\node_modules\firebase-admin\lib\messaging\messaging.js:93:65
at Array.forEach (<anonymous>)
at mapRawResponseToDevicesResponse (C:\projetos\firebase-send-message\node_modules\firebase-admin\lib\messaging\messaging.js:89:26)
at C:\projetos\firebase-send-message\node_modules\firebase-admin\lib\messaging\messaging.js:344:24
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
errorInfo: [Object],
codePrefix: 'messaging'