Notification "This site has been reloaded" [closed]

I googled slot I was only able to get the message "website reloaded in the background"

I am new to this.

URL : https://cyberb.xyz Also I have to send it with the token for some reason, it doesn't send it to everyone.

Also i have made a empty firebase-messaging-sw.js file.

Documentation doesn't help. Also videos.

Help is appreciated.