fcm push meet error :Operation is not implemented, or supported, or enabled.

[黄楷文]

hello, i meet a error when send fcm push, the error is Operation is not implemented, or supported, or enabled. could you. tell me when may cause this error happen?

[Shaun Panjabi]

I am also getting this error too:

*internal.FirebaseError=http error status: 501; reason: server responded with an unknown error; response: { "error": { "code": 501, "message": "Operation is not implemented, or supported, or enabled.", "status": "UNIMPLEMENTED" } } ; details: Operation is not implemented, or supported, or enabled.)

Hoping to get some idea as to what is causing it as well.

[Shaun Panjabi]

I figured out what my issue was. We are using the Go Firebase Admin SDK and was on an older version that was using the legacy API for sending "batch" pushes (SendMulticast), which is getting deprecated.

Updating the SDK from V3 to V4 resolved it. Hope that helps!