"See who has RSVP'd" leads to 'Loading…' …forever.

Clicking on “See who has RSVP’d” on the event page results in a “Loading…” message that never goes away. The list of attendees only shows up if I’m logged out, but not if I’m logged in. I’m using a Mac, and this is the case on both Chrome and Safari. It’s been like this for what seems like a year now, and I was hoping something so fundamental would have been resolved by now.