Problems with sending push notifications

[kvigon]

Good afternoon
There is an iOS application that receives push notifications; for this purpose, a server part was created in node.js with Firebase cloud functions. There is a standard synchronous function for sending notifications, but it works with great loss, so we are trying to make it asynchronous, but we are faced with a problem.

Below is the code, testing on silent notifications

var allMesseges = []
const sendAllMessages = async () => {
const sendMessege = allMesseges.map(async (message) => {
let response = await admin.messaging().send(message);
});
await Promise.all(sendMessege);
};

exports.allSilentPushTrigerAsync = functions.database.ref('/development/allSilentPushTrigerAsync/').onWrite(async event=> {
let snap = await db.ref("users").once("value")
let users = snap.val()
for (const [key, user] of Object.entries(users)) {
if (user.details.pushToken) {
const message = {
apns: {
headers: {
"apns-push-type": "background",
"apns-priority": "5",
},
payload: {
"aps" : {
"content-available" : 1
},
},
},
token: user.details.pushToken,
};
allMesseges.push(message)
}
}
await sendAllMessages()
})

We get an error in the logs

allSilentPushTrigerAsync
pzhv27hvepg4
Error: Requested entity was not found.
at Function.fromServerError (/workspace/node_modules/firebase-admin/lib/utils/error.js:254:16)
at createFirebaseError (/workspace/node_modules/firebase-admin/lib/messaging/messaging-errors-internal.js:35:47)
at /workspace/node_modules/firebase-admin/lib/messaging/messaging-api-request-internal.js:79:75
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at async /workspace/index.js:180:28
at async Promise.all (index 4)
at async sendAllMessages (/workspace/index.js:182:9)
at async /workspace/index.js:207:10

at async /workspace/index.js:180:28 refers to the line of code:
let response = await admin.messaging().send(message);

at async /workspace/index.js:207:10 refers to the line of code:
await sendAllMessages()

Please tell me what the problem is.