Opera push not working?

[Grosso2020]

Hi. I have the latest version of the library. In the Opera browser 122.0.5643.51 I try to send a push notification and get an error:
"success":false,"reason":"Client error: POST https://fcm.googleapis.com/fcm/send/e7CDdiyiYlk:APA91bF26SyBQcKTgMfmp25rSX19NTlSz9krzx8nQ1fSnPZ0fMZsDVVW6cLJBEXxSCJDigWA5AGHf0E4LQPjAhG11_esV5NtR0qPLIHjloxtMEFqE-vHE6D7FTOsEgemaTSdAUV8kVy-` resulted in a 404 Not Found response:\nA valid push subscription endpoint should be specified in the URL as such: https://fcm.googleapis.com/wp/dHIoDxE7Hdg:APA (truncated...)\n"}]}`