Lock and sensor email notifications?

I had the door sensor and lock set up for the last couple of years so that if the lock is unlocked or the sensor is tripped because the door is opened, an alert is generated and email sent.
The emails have stopped since Friday even through I can see a log of recent alerts.
What can I do to get the email alerts set up again? I can’t even find a way to send a test email.

That happened to me as well.

I created a topic on it as well.

Looks like a backend problem.