Thanks! That worked.
For the benefit of anyone that needs help setting this up, here’s what I did. Under Settings > BuddyPress > Components, I enabled “Site Tracking.” Then a message appeared with a “Repair” button, saying that “Site Tracking” needs to be associated with a page. When I clicked Repair, it took me to the “Pages” tab of the BuddyPress settings, where I could see that there was no page associated with the Site Tracking component. To create the page, I clicked on “New Page” next to Site Tracking. I named the page, but otherwise left the page blank. After publishing the page, I could assign that page to the Site Tracking component. Then, under Appearance > Menus, I added the new site tracking page to the main menu.