Lost connection - Fresh deployment using Heroku/mLab

[Sagi Bachar Adler]

So.... I followed the instructions using this:
https://docs.nodebb.org/installing/cloud/heroku/
and everything seemed to go smoothly, I started the app using Heroku, and the first page I get is:

instead of the usual homepage, and it keeps telling me this message:
.

I tried reading through others who had similar issues but failed to find what is wrong with my setup, and not really sure where to start looking as i am new to this. I'd appreciate any help i can get thanks for your time