Teaser image not being set when specified in _config.yml

[TheNathanSpace]

I'm having trouble setting the teaser image for my site.

When I check Facebook's debugger, I get this:

Here's my _config.yml:

# Site Settings
teaser                   : "/assets/images/see_it.jpg"

And the image exists when you go to the direct URL.

Does anybody know what could be causing this?

[TheNathanSpace]

Looks like you have to set it here in _config.yml too:

# Social Sharing
og_image                 : "/assets/images/see_it.jpg" # Open Graph/Twitter default site image