We are actually closing the topics because this is not the correct forums to ask for support for push notifications .
I already told you to create topic on different forum site .
And this is not the right forum to create topic for push notifications . Please create topic here :
https://wplms.io/support/forums/forum/wplms-live/wplms-push-notifications/
refer :
https://wplms.io/support/knowledge-base/how-to-create-a-support-topic-in-new-wplms-forums/
I checked this further and found that the hit to authenticate the realtime database connection is not working in your site :
refer :
http://prntscr.com/o175fa
Currently Im unable to find the reason behind it , why its not working , i will have to examine further .
Apart from this please also follow this :
login via ftp or cpanel file manager and delete this file "firebase-messaging-sw.js" from the root of your site .It must be present where you wp-content folder is .