about:blank#blocked

I have a problem. I’ve developed an app that downloads a YouTube playlist that works fine locally, but when I run it on the cloud, it says it’s downloading videos, but the message appears: “about:blank#blocked”.
Have you ever had a problem like this? Can you help or explain what it might be?
my app link:
https://iqramahmood-youtube-playlist-downloader-app-ovdng0.streamlit.app/

my github repository: GitHub - IqraMahmood/youtube_playlist_downloader: Youtube Playlist downloader