Day 11 of challenge - 503 Service Unavailable

Hi,

I’m working on the “Day 11: Monitoring challenge” in the “30 days of Postman - for developers”.
When I sent a GET request to the “https://water-ttl.herokuapp.com/hygrometer”, I received the “503 Service Unavailable” error.
Could someone from Postman to look into this issue?

Please refer to the following URL.

Thanks,