[Plugin: NextGEN Gallery] Picture Tags links in Menu not working

I am attempting to create a menu consisting of picture tag items that will retrieve all the images with a certain tag when clicked.

I have created a link in my sidebar menu called “people” which should summon all “people” images but instead seems to go to a page which does not exist. Is there a way to make this work?

Site can be viewed here:
https://www.tkogfx.com/boccia_dev/?page_id=130

click on the “people” link in the sidebar to see the issue

Thanks!

https://www.ads-software.com/extend/plugins/nextgen-gallery/