HTTP Error 301: Moved Permanently

I got this error while trying send notification to user.

[RealOrangeOne]

I assume you're trying to send a notification to an Android device? This happens because GCM shut down, and was replaced with firebase. You'll need to convert things to use Firebase rather than GCM.

[SerhiyRomanov]

@RealOrangeOne Does it mean that in the current version of this package the FCM sending doesn't work?

[RealOrangeOne]

@SerhiyRomanov No. It means sending with GCM is broken. Sending with FCM is just fine, although FCM isn't the default, so there's a couple more hoops to jump through.