I have a problem with onebox for Instagram, the links are not displayed.
Has there been any change in the facebook app? I’m missing something? The onebox config in admin seems to be ok.
AI-generated summary
The discussion revolves around setting up Onebox for Instagram. Initially, undasein faces issues with links not displaying. maiki provides a guide on configuring Instagram to work with Facebook, which involves a bit of setup. undasein finds the process tricky but manages to send the app for review after reading the guide. maiki agrees that the process is complex and involves submitting the app for review due to Facebook’s changes to their oEmbed product. Eventually, undasein’s app is approved, and Onebox starts working after following the guide and additional resources from Stack Overflow.
Is this working as expected?
Hiya @undasein. 
Getting Instagram to work correctly requires a bit of setup involving configuring it to work with Facebook.
There is a guide at Instagram and Facebook oEmbed API to stop working, what about Onebox? - #9, and then subsequent discussion that may help you. 
Wow, looks a little bit tricky…
After reading and trying to understand everything, I have managed to send the app for review. But it is not simple at all.
Agreed: it is not simple, just to embed some photos! I worked through the guide yesterday, and pieced together that Facebook had moved their oEmbed product/feature from the default set to one that requires it be “requested”, which of course involves submitting the app for review… 
Let us know how it goes once your app is reviewed, and we’ll update the guide to include all the steps. 
App approved and onebox working 
I have followed the indications and have complemented them with what is discussed here.