Wrapperr is a website-based platform and API for collecting user stats within a set timeframe using Tautulli. The data is displayed as a statistics-summary, sort of like Spotify Wrapped. Yes, you need Tautulli to have been running beforehand and currently for this to work. Note: Wrapperr is not behind authelia.
The very first thing you should do after installing Wrapperr is visit https://wrapperr._yourdomain.com_ and configure an admin username/password. Do this NOW.