Screenshots
(_Direct link to the image:_ https://d.pr/i/93WL8z)
I was able to recreate this as well. Also reported in 24174511-hc.
Note that this seems to be a problem with Facebook's Instagram API--I don't see anything we can do. Here's a status incident regarding the endpoint used to power the block (https://graph.instagram.com/me/media)
https://developers.facebook.com/status/issues/370520597643291/
I was able to recreate this as well on my test site. Also reported in 3362370-hc.
The Facebook API issue appears to be resolved. The Lastest Instagram Posts block should be working again (and is on my sites where I use it). I'm going to close this out, but feel free to re-open if needed.
Most helpful comment
Note that this seems to be a problem with Facebook's Instagram API--I don't see anything we can do. Here's a status incident regarding the endpoint used to power the block (https://graph.instagram.com/me/media)
https://developers.facebook.com/status/issues/370520597643291/