I'm currently on the last challenge for the Business Administration Specialist Superbadge.
I've uploaded both a photo for left of the header and a photo for the banner above the header.

Yet when I submit, I get this error:

Challenge Not yet complete... here's what's wrong: 
Couldn't find a photo assigned to the Chatter group.

What do I need to do to pass this challenge?

Thanks in advance,
-Brian.