Howdy Clint,
Welcome to our support forums and thanks for reaching out to us! I’ll help you here…
From what I see in your site (http://77.104.146.126/~parksid9/events/) and in the system information attached, Photo view is not enabled. To enable it you’ll need to go to ‘WP-Admin > Events > Settings > Display > Enable event views’, check the Photo option and save setting.
In case the 404 happens after the view is enabled please leave it enabled so I can see what the actual page is returning.
Please let me know if the above helps,
Best,
Nico