If the demo displays “😴-Zzzz: This app has gone to sleep due to inactivity. Would you like to wake it back up?”, click the blue button below that says “Yes, get this app back up!” until it redirects you to this screen (attached image) with changing emoji’s and wait until the demo is ready to view and use. This happens because I’m using the free community tier of streamlit.app, so it automatically puts the app to sleep to save recourses and bandwidth for other community users who are also deploying websites/apps on the free tier.