In June 2016 Instagram changed the way that outside parties can access their API - which has broken the connection from your feed to your Safe As Milk theme.
We've come up with a fix, you simply have to re-generate your Instagram token and add it back to your theme.
You can regenerate your token by clicking the generate link on this page http://instagram.safeasmilk.co/. After clicking, you'll be prompted to authorize access to your Instagram. You might be requested to enter your login credentials.
Once this is complete you will be redirected back to a web page where your token will be visible. Now simply copy this token and open up your 'Edit theme' sidebar, then look for the "Instagram Token" field. Take care to remove all of the old token. Then save and check it has worked.