Hangouts notifications don't work, won't get new messages when screen off

Hi,

after resetting my phone to factory defaults and doing new installation, I won't get notifications of new Hangouts messages.

They also don't appear as arriving in background, they are only refreshed when I open Hangouts and the converstaion.

I put Hangouts into trusted applications, allowed running on background etc..

I have never had this problem, other notifications like FB Messenger gmail etc work ok.

Also, when i try to open Notifications settings in Hangouts app, I get a force close.

Any idea?