Members Directory

I promise I have looked for this info for more than an hour, so if it's out there, I just have innocently missed it

I installed the Members Directory plugin. https://premium.wpmudev.org/project/members-directory The directions say to add it to the mu-plugins directory, which I did. I am running a MU installation.

I checked the /members page and it gave me a 404 - so I created a page with the slug "members" and tried that. It is just my blank page.

Any ideas are much appreciated! Thank you!