askvortsov OH I don't really know how it works. I thought it has some kind of connection with the websocket before.
I did test couple times with the notification. It did send notification actually, like this
[2022-04-18 01:34:14] flarum.INFO: [PWA PUSH] Notification Type: postMentioned
[2022-04-18 01:34:14] flarum.INFO: [PWA PUSH] Sending for users with ids: [15]
[2022-04-18 01:34:14] flarum.INFO: [PWA PUSH] Attempting to send 3 notifications.
however, it didn't pop up or do anything to nofify the users. Meanwhile, my other website (not build up with flarum) does notify users by pop up notification in the same brower(chrome desktop version) .(and both of them share the same browser setting). (And at the same time, Web manifest error still exists)
I wonder will it be something to do with the config. Coz I was trying to use multiple domain on the same website, and using the method here filling out the config.php :https://discuss.flarum.org/d/24952-how-can-i-add-multiple-domain-for-a-single-flarum-installation/4 (not sure)