It bounced back. Error: required information missing. Please check the boxes with the red asterisks and make sure you've completed them all.
Huh. So I scan the page. What red asterisk did I miss?
The photo? The photo? You have it set up so I can't join your group unless I upload a photo?
Oh, hell no.
So I downloaded a gif from MeetUp and then reuploaded it as "my picture":
In the unlikely event the organizer contacts me and says "you have to include a real photo", I'm planning to upload this one: