WebPush - FCM issue 404 invalid subscription

[Wade-BuildOtto]

I have been sending push notifications via web-push for weeks but not its stopped working for Opera, Its been working fine with "fcm/send/" but now its complaining its needs "wp/".

WebPushError: Received unexpected response code
statusCode: 404,
headers: {
'content-security-policy-report-only': "script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/goa-520bfc14_2",
'content-type': 'text/plain; charset=utf-8',
'cross-origin-opener-policy': 'same-origin',
vary: 'Sec-Fetch-Site, Sec-Fetch-Mode, Sec-Fetch-Dest',
'x-content-type-options': 'nosniff',
'x-frame-options': 'SAMEORIGIN',
'x-xss-protection': '0',
date: 'Sat, 31 May 2025 00:50:45 GMT',
'content-length': '135',
'alt-svc': 'h3=":443"; ma=2592000,h3-29=":443"; ma=2592000',
connection: 'close'
},
"A valid push subscription endpoint should be specified in the URL as such: https://fcm.googleapis.com/wp/"

The extension registers the subscription so if it needs a new endpoint then it should provide it.
I had this issue for chrome for a little while on Chrome but then it started working again.
anyone seen this issue and/or know how to resolve it.

I know its not an issue with the plugin but if anyone else has this issue in the future hope it will help them as well