Deployment Error deploying Cloud Function with Firebase Trigger - firebase

Question

I am trying to create a Cloud function which sends a firebase cloud message to the users when a new document is created. Somehow I can not deploy the function to Firebase.
Here is my index.js:
const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp(functions.config().firebase);
exports.sendAll = functions.region("europe-west3").firestore
.document("NewsCard/{docId}")
.onCreate((snapshot) => {
const title = snapshot.get("Title");
const subject = snapshot.get("Text");
const payload = {
notification: {
title: title,
body: subject,
sound: "default",
},
};
return admin.messaging().sendToTopic("Announcement", payload);
});
This is the error I get when I type firebase deploy:
✔ functions: Finished running predeploy script.
i functions: ensuring required API cloudfunctions.googleapis.com is enabled...
i functions: ensuring required API cloudbuild.googleapis.com is enabled...
✔ functions: required API cloudbuild.googleapis.com is enabled
✔ functions: required API cloudfunctions.googleapis.com is enabled
i functions: preparing functions directory for uploading...
i functions: packaged functions (64.26 KB) for uploading
✔ functions: functions folder uploaded successfully
i functions: updating Node.js 12 function sendAll(europe-west3)...
⚠ functions[sendAll(europe-west3)]: Deployment error.
...
Error: Functions did not deploy properly.
What is causing this problem? I read somewhere on the internet, that the firestore path .document("NewsCard/{docId}") could be wrong. But I dont know what to use instead.
Here is my Firestore:

Answer 1

Figured it out myself. Seems to be a problem with Node. See #3120 for more information. Downgrade Node to 14 helps.