@user_916283244908702_916283244908702
In case anyone is stumbling about this issue in the future: Got it solved by disabling my private DNS in the android settings.

@martin_870571019083950 Did you manage to solve the issue? I'm on the same boat since I got my new phone yesterday. Enabling push notifications on my new phone throws the exact same error as you had, while my old phone (still connected to the same wifi) still gets the notifications.