It seems that NS1 (Heroku's provider) was having problems, but according to them it has been fixed: https://ns1status.com/#!/incident/365716 https://ns1status.c

It seems that NS1 (Heroku's provider) was having problems, but according to them it has been fixed: https://ns1status.com/#!/incident/365716 https://ns1status.com/#!/incident/365716