"Favorite people" list feature is suddenly missing

I'm a new IMDb user. In my time using the site, I have been building a list of "favorite people" by clicking the heart icon on a writer, director, producer. or actor's page. Just today I tried to add someone to the list but noticed that the heart icon is missing. The button that says "Your favorite people" that would normally appear in the dropdown menu (when clicking my account name on the menu bar) is also missing.

Going to my account doesn't help either. The list I created and the feature itself seem to be missing.

Was this feature removed?