Heroku installation - can't complete last step, help!

[worldfootballonline]

Hi,

I'm having some troubles getting NodeBB up-and-running on Heroku. I've followed the official documentation and I seem to have followed every step correctly. I am however having troubles with the very last step unfortunately and I was hoping someone might be able to help me!

Step 13: Initialise a single dyno: heroku ps:scale web=1

Here's what happens in Terminal:

MacBook-Pro% heroku ps:scale web=1
Scaling dynos... !
▸ Couldn't find that formation.

I've searched around the net already and some have mentioned it may be an issue with having an extension on the Procfile. I have checked this and there is no extension.

I'm so close but yet so far! Has anyone encountered this issue before?! Any help would be greatly appreciated!

Best regards,

Marty.