I followed the steps illustrated in documentation: https://developers.google.com/actions/assistant/updates/notifications
But in the last step when I try to send a notification the api "https://actions.googleapis.com/v2/conversations:send" reply with this error.
{ code: 404,
message: 'App testaction-fff82 was not found. The app preview may have expired.',
status: 'NOT_FOUND' } }
I don't understand just what is not there.
Permission is granted, intent is configurated, the credentials work, the application is the right one.
Has anyone happened to the same thing?